
Gary needs a lodger to help pay the mortgage on his flat. Unfortunately, neither of his lodgers seems to be able (or willing) to pay any rent at all! First there's Dermot and then Tony. Both of these fall for Deborah, who owns the flat upstairs, but get nowhere. Gary also has thoughts in that direction - his problem being the fact that he has a regular girlfriend, Dorothy, who he lives with!
Gary becomes alarmed that he is sexually inexperienced and invents a rampant past. But proving to Dorothy he has had over 50 lovers could be difficult. Meanwhile, in an effort to impress Deborah with his athletic prowess, Tony finds himself on the top board at the local swimming-pool - and immediately regrets it.
Gary has been trying to get to sleep but Dorothy has bad indigestion. Tony is sent out into the stormy night to mend a banging fence while Gary goes off in his dressing gown to search for an all-night chemist.
Deborah decides to sell her flat and go travelling in Asia. But Gary and Tony are horrified as they don't want anyone they dislike moving in upstairs.
Dorothy thinks she might want to have a baby with Gary.
Gary suspects Dorothy is having an affair. He recklessly enlists flatmate Tony's help in an undercover operation designed to gather evidence for the prosecution.
Gary tries to sabotage Dorothy's fledgling relationship, while flatmate Tony has to choose between new girlfriend Jill and his trusty collection of soft-porn magazines.
Gary's father arrives unexpectedly, which threatens Gary's chances of seducing one of Tony's three girlfriends. Meanwhile, Deborah feels left out now that Tony has found success with the ladies.
Gary has just recovered from one shock when he receives another.
Tony tries to muscle in on Deborah's new interest, while Gary quizzes the new pub landlord about his lock-in and deferred payment policies.
Gary shows his yellow streak in a road rage incident and Tony suspects Deborah of having a lesbian affair.
The flat situation has reached boiling point, so Gary is forced to choose between Dorothy and Tony.
Gary and Dorothy finally decide to get married, while Tony unexpectedly has to deliver a baby.
Deborah has agreed to sleep with Tony after Gary and Dorothy's wedding, but the happy couple are having doubts.
A cramped weekend together in a small caravan could spell disaster for the two couples when Tony becomes obsessively jealous and Gary feels a desperate need for a cigarette.
Gary, Tony, Dorothy and Deborah have a quiet night in front of the TV. Tony is sent off to hide and no-one goes to find him, Gary orders pizza and hopes to get it for free, and they discuss Star Trek.
Sex is beautiful and natural - until Dorothy and Gary decide they want to make a baby.
Gary is smitten during a disastrous weekend in Worthing.
Tony appears to betaking life seriously in his new role as a postman, but Deborah realises she preferred him when he was carefree and stupid. Meanwhile Gary's office is closing down and Dorothy is worried about having the baby.
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Gary and Dorothy decide to pep up their sex life by going away to a country hotel. Meanwhile, Tony is hatching a plan to stop estate agent Ray sleeping with Deborah.
Dorothy insists that Gary and Tony hire a cleaner, but Gary's fears of hiring a drudge are thankfully shattered when Portuguese beauty Elena appears.
Gary drunkenly proposes to Dorothy, then regrets it. When no amount of outrageously bigoted behaviour will make her change her mind, Gary becomes a desperate man.
Gary makes a special video tour of his relationship with Dorothy to celebrate getting back together with her.
Tony is worried that his new glasses will affect his sexual career. Meanwhile Dorothy is recovering from a painful operation which tests Gary's patience to the full.
Gary is a bit confused and upset when he returns home unexpectedly from a creative writing weekend to find his girlfriend Dorothy in bed with his best friend and flatmate Tony.
Gary feels decidedly middle-aged when Deborah starts hanging out with her new friends at university.
Gary's bank statement holds a five-figure surprise, while Tony's own figure leaves Deborah cold.
Deborah and Dorothy are both away for the weekend, so Gary and Tony invite the girls next door over.
Dorothy has persuaded Gary to see a relationship counsellor. Meanwhile, Tony is having less success convincing Deborah to make love in unusual places, and no luck at all in his attempt to impress her mother.
Gary agrees to get rid of his beloved 25-year-old sofa, but not before reminiscing about his life, including his first day at the office and how he met Dorothy.