 Harnos portrayed Jennifer Greene, the first wife of main character Mark Greene on "ER" (1994–2002), Josie Ray in "Remembering Sex" (1998), Dotty from "The Girl Gets Moe" (1997), Rimmer in the action-horror film "" (1996), Kaye Faulkner in "Dazed and Confused" (1993), Linda Wyatt in "Judgement Night" (1993), Sarah Hughes in "Cold Dog Soup" (1990), and Sid in "Denial" (1990).In 2003, Harnos left acting to pursue a degree in child development at Mills College.In 2006, she helped co-create the circus outreach organization Circus Remedy with Anthony Lucero and Terry Notary.