It is Lucy's birthday. To celebrate, Geoffrey and Wendy take Lee, Lucy, Toby and Anna for a trip on a vintage steam train. But Lee decides to play Poirot when a stranger turns up unannounced in their carriage and Lucy's special day is ruined.

When Lee goes to watch Benji playing football for a local Under 13 team, he is unable to restrain himself on the touchline and becomes the competitive dad that all the other parents avoid. Undaunted by the disapproval of Toby, who coaches the team, Lee sets about rigging the vote for the Player of the Year.