Series 5 to 7 featured Bodger and Badger living in a rented bedsit flat (Exterior scenes were filmed at No. 78 Grove Avenue, Hanwell in London). This was the beginning of the show's most popular and best-remembered period, series 5–7. Badger met his new friend Mousey in Series 5, a mouse who lived under the floorboards. She became a permanent fixture of the programme from that point onwards. Just as Bodger tries to keep Badger's presence hidden from figures of authority, Badger in turn kept Mousey's presence a secret from Bodger, because Bodger tried to get rid of Mousey in the first episode of Series 5 by setting traps.

These episodes reverted to the 15 minute format.

Bodger and Badger are living in a new flat. They think they're alone until Badger makes friends with a mouse who lives under the floorboards.

Badger finds it hard to visit Mousey under the floorboards, so he thinks of a plan to get under.

After their new washing machine blows up, Bodger and Badger have to go to the laundrette. Badger causes chaos as usual and the pair accidentally leave Bodger's washing in the laundrette.

When Bodger accidentally paints a shop sign back to front, Badger finds a quick solution with an electric saw.

Bodger has trouble with two burglars, "Boss" and Courtney, who try to steal a valuable Ancient Egyptian statue which belongs to Bodger's aunt. Badger decides to scare the burglars off by being the ghost of the Egyptian statue.

When the rent money goes missing, Bodger and Badger are told to move out. Nothing can help them get their flat back - except Mousey.

Bodger's old school friend - the greedy Raymond Tompkins - comes to stay, and Badger declares war to scare and get rid of him.

Bodger rations the mashed potato, so Badger invents a twin brother in order to get double his portion.

When Bodger decides to borrow a cat to get rid of the mouse in the house, Badger and Mousey have to find a way of showing him he was imagining things.

Badger wants to go to the seaside but the weather forecast is bad, so he decides to make his own seaside - in the bathroom.

Badger and Mousey trick Bodger into believing that martians are under the floorboards.

Badger makes a huge amount of mashed potato and then has to find places to store it, then Bodger's computer goes wrong after Badger and Mousey have a go on it.

During a race with Mousey, Badger bangs his head and loses his memory. Mousey helps him to remember by reminding him of all of the adventures they have had.