Nicki's moved in with Sangita while Moz has a nervous new neighbour, Judith. Derrick and Yasuko are due to get married and Moz is asked to be best man. Cartoon Head has a special surprise for the stag do.

Moz's landlord is coming to visit at the most inopportune time.

Moz might be falling for his new neighbour Judith while being haunted by the ghost of Craig.

Elderly neighbour Mrs Coneybear is disturbed by strange noises and decides to hold a seance. Moz is concerned about keeping his marijuana plants a secret, Steve discovers what happened to his brother and Judith makes a surprising confession.

Cartoon Head and Psycho Paul pressure Moz into helping them carry out a kidnapping, but he refuses - until the mouse-masked hit-man's infamous boss Stemroach pays him a visit. A policeman gets trapped in the loft, threatening not only the abduction but also the drug dealer's own business.

It's the day of Derrick and Yasuko's wedding, but Moz has a tough time getting the groom to the registry officer on time. The dealer also has to keep the kidnap victim trapped in his flat a secret from a series of unwanted guests - and accomplish both tasks while under the influence of magic mushrooms.

PC warns Moz of an imminent drugs bust, so the dealer embarks on an unscheduled spring-cleaning exercise as he sets out to destroy all the evidence in his flat. Meanwhile, Colin falls in love, and Nicki goes into labour.