Tiffani-Amber Thiessen for Shannen Doherty, Beverly Hills, 90210

Beverly Hills 90210 Tiffani Thiessen Shannen Doherty

Doherty’s exit from the Fox soap was filled with drama off-screen, but Thiessen’s introduction in Season 5 as Valerie Malone brought the drama on-screen. When Valerie — the daughter of the Walshes’ Buffalo friends — came to live with Brandon and his family, she became the show’s first true “Bad Girl,” lighting up a joint in Brenda’s old bedroom and badmouthing the Beverly Hills teens in her very first episode. In fact, Thiessen was so good at adding a much-needed dose of edge and spice, while also juggling her character’s traumatic past, that she stayed on the series until Season 9. B+