S6·E88 Episode 410 (Thu 1st Dec 1977)

Lesley informs Joe that she's got a secret to tell him but Amos is in earshot. After Sam's refusal to be best man at the wedding, Annie turns to Henry who readily accepts. The only problem is that the football team will be left without a trainer. Henry quickly solves the problem though by suggesting that Amos could do it instead and Sam agrees. Amos gets the wrong end of the stick when he sees Annie and Henry setting off in their finery for the church. He decides to stick around and see what develops, totally forgetting about the football match.