Twenty-five years ago today, on Oct. 18, 1988, the sitcom Roseanne debuted on ABC. And 75 years ago, on Oct. 18, 1938, actress Dawn Wells was born.

Wells is best known for playing Mary Ann on Gilligan’s Island. But did you know that Wells also once played Darlene on Roseanne? Yes—in the tag at the end of the episode “Sherwood Schwartz: A Loving Tribute,” Wells appears as Darlene; Tina Louise (Ginger) as Roseanne; Bob Denver (Gilligan) as Jackie; and Russell Johnson (The Professor) as Mark. Sherwood Schwartz also makes a cameo appearance. The episode itself has the inverse arrangement, with the Roseanne cast playing Gilligan’s Island characters in a fantasy sequence.

Closing tag, “Sherwood Schwartz: A Loving Tribute,” Roseanne (May 24, 1995)