S7, E1: Bob is repairing a leaking water tank at the school, when he discovers bats in the belfry.. Meanwhile, Mr Beasley has adopted Mr Dixon's homing pigeons but when he lets them out of their cage, they cause havoc in his living room, smashing his bookcase. Mr Beasley calls Wendy to come and repair it. Seeing his dilemma, she builds him a pigeon loft. Bob then calls Wendy to bring Lofty over to the school, where the crane manages to catch the bats in a tennis net as they fly out at nightfall. Mr Beasley goes to see how his pigeons have settled in, but they have flown the coop. Flustered, he calls Wendy who gets an idea - she and Lofty take the bats around to Mr Beasley's and persuade him to let them live in his pigeon loft. Bob completes the repairs on the water tank, and the pigeons return to Mr Beasley's with a message explaining that they have gone back to Mr Dixon as they were feeling homesick. But Mr Beasley is delighted as the bats will make ideal pets.