Can anyone tell when what Sarah Chalke's first and last episodes were (not including season 9)? I know Lecy is in seasons 1-4 and in the first two episodes of season 5. I guess there is no Becky for the rest of season 5. Sarah then appears in season 6, although some of the openers don't show a Becky. When did she start?

She debuted in the episode when Dan was having that High School reunion get together at his house. She was not featured in the credits until the end of the show and then the next ep which I believe was the Thanksgiving ep, she was featured in the credits. Don't remember what her last ep from season seven was. In season eight, she subs for Lecy who is unable to make three tapings, the two part disney ep and then the wedding show with Darlene and David and then comes back full time for the final season in which she had three lines or less with the exception for the last episode in which she actually had over five lines. LOL.

Thanks, ThomasE. That clears things up.

I think the last episode Sarah Chalke is in, in season 7 is actually the "Happy Trailers" episode. I can't recall her appearing in anymore episodes after that. and you're right about season 9, sarah was in about 6 or 7 episodes with usually just 1 line, basically she was more of a background character in season 9.

One of the things that confused me was the two "trailer" episodes. In season 7 "Happy Trailers," Becky (Sarah) and Mark moved in. Later in season 8 "Becky Howser, MD," Mark throws Becky (Lecy) a surprise party. Since I watch the show on several different stations, it is hard to grasp the continuity.