In the seventh season episode "Archie's Chair" (1/15/77), Mike and Edith are going into the living room. Mike: Ma, do you have any coffee? And Ma, do you mind if I drink it in the living room? I gotta catch Sesame Street. Edith: I thought that was for little kids! Mike: Yeah, it is but they got a great show on today about the letter Z. Besides I heard that Big Bird's gonna lay an egg today.