When Mike and Robbie cross swords over a blonde schoolgirl, the issue widens until the whole family is involved in the argument. But it is difficult for Steve to teach his sons that violence solves nothing with a pugnacious father-in-law around.

On a dark night when Steve is away, Robbie and his date are frightened by a man in a trench coat. It all happens when Robbie is seen putting on the hubcap of his next door neighbour. Steve isn't too concerned when he hears about the incident as he thinks it all stems from Robbie's steady diet of spy and mystery stories.