Thicker Than Water is the 17th episode of Season 4 on FOX teen soap Beverly Hills, 90210.


David's increased drug use turns into a nightmare for him, Kelly and their parents when, while under the influence of sedatives, he loses baby Erin at a park. Meanwhile, Donna temporarily forgets about David when she flirts with an attractive ski instructor, named Chad, during a ski trip with the rest of the gang. While Suzanne is out of town, Dylan spends the day with Erica teaching her how to surf, which takes a turn when Erica gets her first menstrual period. Then, Jim makes a background check of Suzanne for Dylan with her social security number and uncovers a secret bank account in her name. When Dylan confronts Suzanne about the $25,000 in her Iowa bank account after she previous told him that she was broke, Suzanne convinces Dylan that it's just inheritance money from his late father. Meanwhile, Andrea sees a doctor and makes a shocking discovery about herself.


Jason Priestley as Brandon Walsh
Shannen Doherty as Brenda Walsh
Jennie Garth as Kelly Taylor
Ian Ziering as Steve Sanders
Gabrielle Carteris as Andrea Zuckerman
Luke Perry as Dylan McKay
Brian Austin Green as David Silver
Tori Spelling as Donna Martin
Carol Potter as Cindy Walsh
James Eckhouse as Jim Walsh

Recurring cast

Ann Gillespie as Jackie Taylor
Matthew Laurance as Mel Silver
Kerrie Keane as Suzanne Steele
Noley Thornton as Erica Steele


Zachary Throne as Howard
Pepper Sweeney as Chad
José Angel Santana as Detective Miller
Robin Frates as Andrea's Doctor

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