The Puppy Episode (1) - S4-E22
Continuity mistake: In the scene where Ellen goes to Susan's room after Richard makes a pass at her, she has her jacket in her hand when she enters the room. When Ellen leaves the room hurriedly, she leaves without her jacket, but when she is in the hallway about to go back to Richard's room, she has her jacket in her hand.
The Puppy Episode (1) - S4-E22
Continuity mistake: When Ellen tells her friends that she is gay, she starts to digress. There is a bunch of wine glasses on the counter directly behind her. In several shots of the friends around the table, there are no glasses to be seen, but when Audrey says "I thought you had something important to tell us", she is holding a glass of wine. When you next see Ellen, the glasses are no longer on the counter, and the glasses are actually on the coffee table a moment later when the friends get up to leave. Yet no one actually served the wine out or got up to get any from the counter.
The Boyfriend Stealer - S1-E11
Continuity mistake: When Ellen is in the line to get the descrambler, she passes by a poster that says "the atmosphere". Shortly after we see her again she passes by it a second time.
Saint Ellen - S2-E2
Continuity mistake: When Ellen is making calls to solicit donations, one shot has her cradling the phone between her head and shoulder, but in the very next shot she is holding it with her hand.
Continuity mistake: The office in the book store changes from being quite large in the first season to very cramped and small from the second season onward.
Continuity mistake: The bathroom in Ellen's apartment, depending on where the shot is taken, is either seen as incredibly small, or when shot within the bathroom, quite large and spacious.
Continuity mistake: Throughout the scene in the bookstore Ellen is shown alternately holding her mug by the handle or the cup part, as well as alternating hands.
Continuity mistake: There is a large black cue ball on a wooden base beside the staircase at the bookstore When the crowd rushes past it it gets knocked to the floor and bounces away, but immediately after in the next shot it is back on the base, then it is gone again.
Answer: This groundbreaking episode was in the fourth season, episodes 22 and 23.
Jason Feng