Don't Know Why The couples solve their problems; Dylan gets his job back. Details Casts Videos Posters Season Lists Title Don't Know Why Genres Drama Soap Release Date 1992-12-27 Episode Runtime 00 Hours 25 Minutes Season Number 4 Episode Number 9 Production Companies Unknown Ryan Reynolds... Billy Simpson... Enuka Okuma... Kelly... Pepper Binkley... Pepper O'Brien... Chris William Martin... Dylan Blackwell... Laura Harris... Ashley Frasier... Robyn Ross... Brooke Morgan... Sarah Douglas... Courtney Simpson... Fifteen (aka Hillside) Teen soap theme song. (1991) (Opening Credits) Original Size (680x1020) Season 1 13 Episode(s) 1991-02-03 Season 2 13 Episode(s) 1991-08-04 Season 3 13 Episode(s) 1992-02-02 Season 4 26 Episode(s) 1992-11-01