Eileen (Robin Riker) is an antagonist in the WB sitcom "What I Like About You." She appears in the Season 2 episode "Spa Day" (2002).
Eileen is the manager of a day spa. When Val and Holly arrive for a spa day, she acts snobbish and condescending toward them. After Holly sneaks out to have her photo taken with JC Chasez of NSYNC, Eileen stops her from returning to the spa, inventing a "no re-entry" policy on the spot and making an employee drag her out. Holly manages to re-enter through a window and land in a mud bath, only to be discovered by Eileen, who calls her a "brat" in front of Val. Eileen then orders Val and Holly to leave.
After the two sisters have left, Eileen begins cleaning the mud bath. Val sneaks up behind her and gets revenge by shoving her on the butt, sending her face-first into the mud with a loud splash. The last we see of Eileen is her standing up in the bath, unrecognizable (and presumably humiliated) under a head-to-toe coating of mud. Val gives her a smirk and leaves.
- Robin Riker appeared as evil witch Catherine Madison on the 1997 episode "The Witch" for the TV series Buffy the Vampire Slayer,
- Robin Riker appeared as crazed murderess Frances Pritchard on the 2004 episode "Til Death Do Us Part" for the TV series "Crossing Jordan",
- Robin Riker appeared as evil werewolf matriarch Linda Greybeck on the 2011 episode "Alex Meets the Parents" for the TV series "Wizards of Waverly Place".
- Robin Riker later appeared as psychotic villainess Colleen Barton in 2019's Psycho Granny.