Ronnie Corbett plays granddad Sandy Hopper in this sitcom which reunites him with the writers of his hit comedy Sorry—Ian Davidson and Peter Vincent.

In this third episode, The Rival Granddad, we meet Sandy's grandson Tyson's other Granddad—Rex—who is a popular swashbuckling figure of a man, Tyson's hero and thus the bane of Sandy's life. Sandy's chance to get even comes when he takes Tyson and his sister Zoe to a new Adventure Park featuring dinosaurs, sharks and a great many light-fingered monkeys. Can Sandy's lodger, Dolores, save Sandy from an utter fiasco?