As Dave Quinnan's stag night begins, an old friend turns up - Steve Loxton. A newly sober Jim Carver faces temptation and ridicule from his colleagues as the night wears on. Jenny and her friends rope DC Procter into helping them investigate a stripper who is indecently assaulting the patrons of the strip club they attend, but Vicky Hagen is forced to take matters into her own hands. Insp. Monroe waits desperately for the duty inspector to relieve him, but he is delayed for most of the night. Paranoid that the lads have hired a stripper, Quinnan takes refuge at Polly Page's flat, where she drops a bombshell that she is in love with him. Dave returns to the party, but falls on a bottle, injuring his hand. Arriving at St Hugh's, he is alarmed when his 'doctor' removes her clothes and tells him he's been a very naughty boy and will need to be punished!