The Real Thing: Part 2 - S4-E2
Continuity mistake: In the previous episode Jennifer sees Ellen Reed for the first time while talking to Alex (when Alex is holding Andy). In this episode, she sees Alex viewing picture of Ellen and asks "who is Ellen Reed?" as if she had never seen her before. (00:12:10)
Continuity mistake: In this episode, Mallory and Skippy are talking and Mallory starts a sentence with "remember when we were 2 years old..."? This is incorrect as an earlier season had an episode in a flashback when the Keatons just moved into their house and the kids were young and Skippy meets Mallory for the first time and instantly falls for her. Both Skippy and Mallory were about 5 or 6 years old in the scene so knowing each other at 2 years old was not possible.
Answer: Since they don't have a door there in the living room but they do have a door there in the dining room I assume it leads to the dinning room and the door upstage is probably straight to the living room while the door downstage goes to the dinning room and then through more doors you get to the door in the the living room. Hope that made sense.