90210's Gillian Zinser Won't Return for Season 5 Seattle Post-Intelligencer Copyright 2012 Seattle Post-Intelligencer. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Published 06:37 a.m., Wednesday, May 23, 2012 Gillian Zinser will not be returning to 90210 for the show's fifth season, TVLine reports. In the CW drama's May 15 finale, Zinser's character Ivy Sullivan ran away to Mexico with her boyfriend Diego (Yani Gellman), who was on the brink of being deported.