Tiffani Thiessen left Beverly Hills, 90210 in the show’s ninth season. She played Valerie Malone from 1994 to 1998 , with a later guest return in the final season.

Quick Scoop

  • She joined in Season 5 and departed in Season 9.
  • Public coverage also notes she left the series in the early episodes of the ninth season.

One-line answer

So the simple answer is: Season 9.