Lost Youth was the 17th episode of Season 7 of Roseanne, also the 164th overall series episode. It was written by Pat Bullard and Stevie Ray Fromstein, and was directed by Gail Mancuso. It originally aired on ABC-TV on February 15, 1995.
David and Mark fight over Stacy (Traci Lords), a Lunch Box waitress. Jackie confronts Fred about their boring sex life.
David (Johnny Galecki) and brother Mark (Glenn Quinn) go gaga, ogling over the buxom, bosomy sexpot Stacy Flagler (Traci Lords), the new waitress at the Lunch Box. Roseanne heightens the tension by making David paint a mural at the diner. Meanwhile, Jackie wants to spice things up between her and husband Fred (Michael O'Keefe).
Note: Sara Gilbert, who plays Darlene, does not appear in this episode.