The entire episode was done in real time from start to finish.
This is a "bottle episode", an episode with limited cast and sets produced due to limited budget. The entire episode takes place in the Bundy's living room, with only the main cast appearing and no other characters (save for some voices heard on the radio).
First time Al makes a chicken joke towards Marcy.
First time Al makes a no breasts or small breast joke towards Marcy.