Diff'rent Strokes (1978)

A Case of Overexposure - S5-E8

Continuity mistake: In season one episode 16, Arnold says that him and Willis never met their landlord. In this episode they remember him as Mr Darcy - when they see him they recognise who he is.

Willis Jackson: Arnold's always under my feet. I'll never have any privacy until he gets married.
Arnold Jackson: Married? On MY allowance?

The Big Heist - S4-E5

Trivia: Arnold is in court and the judge asks the family how they know him. Right after Mr. Drummond says "I'm his father", Willis says "I'm his brother" and puts emphasis on "brother." The reason for this was revealed on a blooper program; in an earlier take, just after actor Conraid Bain said "I'm his father", actor Todd Bridges blurted out "I'm his son."

Jeff Swanson

Season 5 generally

Question: In Season 5, Willis is in the Letterman's Club, but in Season 4 (the BMOC episode), less than one season earlier, he was turned down by the seniors. When did he get accepted into the Letterman's Club?