Step 1 : Introduction to the question "Wendy's famously pulled all of it's ads from which TV sitcom in 1997?"
... The Puppy Episode" is a two-part episode of the situation comedy television series Ellen. The episode details lead character Ellen Morgan's realization that she is a lesbian and her coming out. It was the 22nd and 23rd episode of the series' 4th season. The episode was written by series star Ellen DeGeneres with Mark Driscoll, Tracy Newman, Dava Savel and Jonathan Stark and directed by Gil Junger. It originally aired on ABC on April 30, 1997. The title was used as a code name for Ellen's coming out so as to keep the whole episode under wraps.