Ella Davis' long time friend Olga Stiles, an obstetrician, is facing charges in the Supreme Court for contributing to the massive brain injuries of a young woman, Kim Cusack, following complications with her Caesarean delivery.

Opposing counsel Richard Savage employs a dramatic, emotive tactic to win the hearts of the jury, forcing Ella and Happy to call an adjournment to rethink their options.

Meantime, Caitlin cuts her teeth on a case of surgery politics involving two doctors at each other's throats. The resolution for this one will need some truly lateral thinking.

Jamie enlists Caitlin's help in some hands-on sleuth work to discover the truth about a woman's claim of sexual misconduct.

As they prepare to enter final negotiations on the Cusack case, Richard confronts Ella with information that forces her to draw on all her resources to balance her own emotions with the tragedy suffered by a young couple.

Ella must get to the bottom of a tragic case in which an elderly man dies inexplicably, while the young doctor on duty insists he can't be held responsible for the death.

Caitlin gets her day in court, when she refuses to be intimidated by a violent ex-crim, who wants to be compensated because his doctor didn't keep his tonsils for him after they were removed.

A psychiatrist performs surgery on a young ballerina with disastrous consequences and turns to MDA for help. Happy must convince the president of MDA to extend indemnity to the doctor.

Nick, Ella's partner, is offered a lucrative research position in Philadelphia and tries to use it to lure Ella back to him. Hoping to heal some of the damage done by his affair, Nick promises Ella greater commitment to their relationship.

A young mum is suing her doctor after losing the sight in her good eye following surgery on the other. Is the surgeon to blame for not warning her of the one in 14,000 chance of sympathetic blindness - an effect with no known cause? Both Ella and Richard compete to enlist the famous maverick surgeon, Jock McGeoghan to their side, unaware that the presiding judge has a few surprises of her own.

Jamie takes up the challenge when an attractive psychiatrist is accused of providing financial advice to a delusional, schizophrenic patient.

Caitlin is drawn towards Richard's distinctive professional style, and Happy must face a personal health crisis.

Ella becomes increasingly ambivalent about fighting a case against the mother of twin boys, one of whom has spina bifida.

Her expert witness, Paul Bennett, seeks to rekindle their med school relationship.

At MDA, Happy, in high anxiety about the results of his colonoscopy, tries an unusual approach with a doctor who has had a Hepatitis C test done without his patient's consent.

Meanwhile, Richard Savage tests Caitlin's career ambitions by getting her invited to a Law Society lunch; and Jamie falls for a heroic and beautiful young doctor facing a Coronial Inquiry and a possible manslaughter charge.

Caitlin and Jamie are in conflict when they represent a young anaesthetist, whom Caitlin is sure is not what he seems.

For Ella and Happy, it's a feeling of ""here we go again"" with another psychiatrist accused of sexual misconduct, but luck, Ella's intuition and Happy's legal skills reveal the truth.

Jamie guesses the real problem for a frisky senior citizen who claims he's shorter after a circumcision, but he's dubious when Ella suggests that the best lawyer to defend Wendy Rossi is Richard Savage.

All on the one night: As Ella and Tony deal with one emergency after another at St Albans Hospital, Layla makes her first public speech to first year med students - and wins a heart.

Richard draws out a straightforward mediation till late at night to impress his client - but not Caitlin - and the mediator notices something going on between them.

Back at MDA, the Board grapples with the collapse of their insurance company and whether MDA will defend Wendy Rossi on her manslaughter charge.

MDA and Richard Savage actually work together to sort out an angry and guilty young man, who is desperate to blame a palliative care doctor for the loss of his cancer sufferer father.

Richard represents an aspiring model and actress against a plastic surgeon for an ""unnatural"" breast enhancement.

Loser lawyer Helena finally gets a strong case of ""vicarious responsibility"" against a psychiatrist whose patient jumped from a window in her absence. Richard sets up a job interview for Caitlin with a prestigious law firm.

As Happy is pre-occupied searching the city for his estranged son Jason, Caitlin takes over the breast enhancement case against Richard - with some surprise help from Jamie.

A country GP, under-qualified in obstetrics, loses a mother after childbirth. Unfortunately, it's not his first disaster.

Tony loses confidence and grows increasingly anxious over the impending civil action against him and Ella. She, meanwhile, is just beginning her battle for a top surgeon charged with misdiagnosis of cancer, amid huge and growing public sympathy for the dying woman.

Ella and the MDA team must move fast when the case of young mother Debbie Shanahan, dying of cancer, is brought forward. Richard Savage plays the sympathy card for all it is worth.

Despite a clear conflict of interest, Happy persists in representing a psychiatrist whose patient committed suicide and was Happy's son's best friend.

Jamie has to tell plastic surgeon Vince Phillips that he is in trouble yet again, and deal with an angry med student, who is already being sued.

Ella (Kerry Armstrong) must play medical fact against a tough judge and enormous public sympathy when the Debbie Shanahan (Suzi Dougherty) case against breast surgeon Teresa Commons (Toni Scanlan) goes to trial.

Tony (Aaron Pedersen) is demoralised by the press coverage as he worries about the negligence writ against him and Ella. Layla (Petra Yared) tries an unusual way to reconcile Happy (Shane Bourne) and his estranged son, while Caitlin (Alice McConnell) and Jamie (Angus Grant) deal with an MDA member who wants a no claim bonus.

Jamie (Angus Grant) is dismayed when a very depressed Wendy Rossi (Daniela Farinacci), back in town for her Medical Board hearing, rejects his help.

Ella (Kerry Armstrong) confronts the big problem of a country GP practising as an obstetrician without the proper training. A mother and then a baby have died in childbirth. But who else can deliver the region's babies?

Vince Phillips (Steve Kearney), the subject of six negligence writs in the past year, but now a member of the MDA Board, makes a surprise revelation.

As Ella and Tony wait for the verdict in the negligence case against them, MDA receives a class action writ from 72 of their members, alleging MDA lied about the organisation's financial health.

Jamie goes to a kids' soccer match to hear about a job offer, but gets stuck there when a boy is injured on the field. Meanwhile, Richard interviews a possible new client, a convicted murderer, who claims anti-depressants made him do it. Happy gets an unusual message from his son Jason.

Ella must talk inexperienced nurses in a remote rural area through life-saving procedures by phone. She and Caitlin clash with Richard (Jason Donovan) over the ethical issues involved in IVF. At the same time, Richard tries to calm his client Alison who's still angry after the verdict in her civil action against Ella and Tony

Layla gets an unsettling e-mail from Vietnam, as Happy tries to secure indemnity cover for important but very experimental medical research. The class action and a flood of new claims puts MDA's future at risk, but new Board Member Vince Phillips is full of ideas.

The MDA team must deal with the painful aftermath of the attempted murder of Ella, Jamie and Tony. Despite eight hours in the operating theatre, Tony dies and the effect on the survivors is far-reaching and profound. While Jamie is eerily withdrawn, Ella comes to accept the loss.

Caitlin waits for the injured Ella's return to work and then, goaded by Richard, announces her new job at Richard's firm. Happy will never forgive her and it is another blow for the fragile Ella.

A locum legal case manager, Amanda McKay, joins MDA while Ella and Jamie recover. She works with Caitlin and Happy in defence of an IVF doctor accused of breach of contract. An IVF baby has died soon after birth, due to an undiagnosed genetic condition. MDA successfully defends the doctor, but the case could have far reaching consequences for IVF doctors and their patients.

Meanwhile, Ella and Amanda go into mediation against Gretel Celeste, a medium who claims to have lost her psychic powers as a result of an appende

Ella and Happy face a hard fight defending a doctor who trusted a pathology report and thus missed a cancer in a nine-year-old boy. The biopsy slides and the pathologist are missing. Richard becomes emotionally involved with the terminally ill boy, and is shaken to discover that the parents absolutely refuse to tell their son he's dying.

With the trial fast tracked, Ella enlists unpredictable surgeon Mr Simon Lloyd as an expert witness. His care and passion for the case and the mediation provide unexpected results and a violent response from Richard, when Simon breaks the rules and confronts the grieving parents. When the elusive pathologist shows up, she confesses she got it wrong and Ella is devastated.

At Kato & Pittman, Caitlin is reminded of her junior status when Richard has her drawing up wills. But Caitlin discovers her client's husband could well have a very large med-neg claim against their GP, who failed to diagnose kidney failure. It should be an easy and big win for Caitli

Richard and Caitlin represent a nun who has had a complete mastectomy of a perfectly healthy breast. Happy and Amanda defend the surgeon who mixed up the biopsy results. Amanda's defence - that the loss of a breast is not an adverse outcome for a nun - is inventive, to say the least, and Happy is both shocked and impressed. Ella is shocked and disappointed.

Still in turmoil after her brush with death and the loss of Tony, Ella is offered a fulltime job as Head of Emergency at her hospital, St Alban's. Of course this would mean quitting MDA.

Jamie is thrown further off balance when Wendy tells him she's still thinking of joining Doctors Without Borders and doing aid work overseas. Before that issue can even be discussed, Ella, Jamie and Wendy try to save a young mother who urgently needs a heart transplant. They must persuade the grieving parents of a brain dead boy to accept that he is gone and to allow their son to be an organ donor in time. But bureaucratic delays and a fateful meeti

Ella, unhappy at Happy and Amanda's legal tactics over representing a deceased MDA member, tells Happy that she's been offered a fulltime job at St Albans Hospital. As she thinks it over - and then accepts the job - she approaches surgeon Simon Lloyd as her replacement. When Happy realises that Ella really is leaving MDA, he regards it as a betrayal.

Caitlin and Richard argue over the case of a woman left with paralysed vocal chords after a throat operation. Caitlin thinks the woman has no case, but cunning Richard finds a point of attack. The real source of tension between them is Caitlin's new lover, Justin. Over at MDA, a psychiatrist seeks Amanda's advice. The police are bugging her therapy sessions with a man they suspect of murder. Amanda realises that man is Justin. What does she do about it?

Surgeon Simon Lloyd has his first day as a case manager at MDA, as Ella sadly packs up to leave. Layla prepares a farewell, while Happy buries himself in work.

Amanda and Simon work together on the paralysed vocal chords case, but Amanda doesn’t know what to make of the enigmatic Simon.

While Richard and Caitlin also prepare for the vocal chords case, he learns accidentally that the police suspect Caitlin’s new lover of murder.

The press takes an interest as Happy and Amanda gear up for an appeal hearing in the Supreme Court. On the plaintiff’s side, Caitlin is doing all the work and Richard is taking all the credit—as usual.

The group of doctors suing MDA now personalise their grievances and attack Happy in the media. But Happy fights back—with some help from a retired Flying Doctor. The old doc is being sued for negligence in delivering a baby, but Jamie discovers he can’t remember the incident at all.

Happy and Simon are dismayed when the MDA Board refuses to indemnify a neurosurgeon for experimental spinal surgery. While the paraplegic patient waits hopefully in hospital, Happy, Simon and Mark work to overturn the decision.

Happy Henderson has a very busy day. Negotiating with Richard Savage to contain a potentially huge damages claim, Happy also tries to avoid being sacked while lobbying to keep Mark Matthews as President of MDA.

Richard Savage is determined to secure the biggest damages claim in Australian history when he represents a top tennis star whose career may be over after shoulder surgery.

Ella becomes involved with an unqualified and anarchic Russian doctor Mikhail Voronin.

Richard turns to Happy for help when his old mentor, whom he is representing, threatens to expose his sometimes dubious practices.

A charismatic, brilliant geneticist, Professor Robyn Masterson approaches MDA to get indemnity for a daring medical experiment. Happy begins to question his work at MDA.

Julia Delvecchio is concerned that the break-in at the lab has compromised the team's work, but Robyn is determined it will not force any delay in the trial on Belinda.

A dedicated intern at an outer suburban hospital, struggles to clear her name when she is accused of incompetence.

In the final episode of MDA, Happy is hospitalised after his heart attack and Dr Liz Gibson again has to front the Health Review Board.