When Professor T is jailed and finds the sights, sounds and smells of prison hard to take, Dan and Lisa try to distract him with a murder case.

When a body is found floating in a hotel swimming pool, the police suspect foul play and decide to get Professor T's help.

Professor T is up in court and must decide whether to save himself or his former lover, and there are no end of suspects in a prison officer's death.

Professor T is desperate to get back to his work when he is called on by the police to investigate a series of unexplained deaths.

Professor T must prove his innocence when he comes under suspicion after a murder at a criminology conference.