Mrs. Stick is away, so Captain has to spend 24 hours at Bobby’s house. The cat is quick to make Bill’s life a misery, and he isn’t allowed to react to the teasing of his so-called “guest”. There’s only one way for Bill to reclaim his territory: together with Bobby and Caro, he’ll play Captain at his own game...

The trio takes a dislike to Julie, Bobby’s new sitter. But when Bobby finds out that she’s hoping to be chosen to appear on reality TV show Master Nanny, he changes his mind about her, much to the dismay of Bill and Caroline who are as determined to get rid of her as ever!

When Bobby and Bill’s neighbor captures Caroline the tortoise, believing her to be dangerous, the boys will do anything to get her back safe and sound! Our three friends refuse to let anyone come between them, not even a former secret agent. And our heroes have more than one trick up their sleeve...

When Bill finds an enormous bone, Bobby thinks it must belong to one of the dinosaurs at the museum and wants to take it back. No way is Bill giving up that bone; but he’ll have to watch out for Ming and Fluff, who know a good bone when they see one, and Captain, who hides the bone just to tease him!

Bill will do everything he can to avoid getting his rabies shot as he is scared to death of needles; Bobby will need to deal with his two animal friends if he's going to persuade Bill to get the shot.

Bobby is so wrapped up in his virtual bulldog that Bill and Caro feel as though he's forgotten they exist; the duo decides to fight for his attention, and won't stop until they've won him back.