Robin was nominated two times for an Ace Award as "Best Actress in a Comedy Series" for her role as Kelly Hall on Brothers. She has had recurring roles in The Glades, Boston Legal, Reba and Hung. Riker has guest starred on scores of other shows including Six Feet Under, Big Love as well as creating the role of The Witch, Catherine Madison on Buffy the Vampire Slayer, The Rockford Files, M*A*S*H, The A-Team, Airwolf, Murder, She Wrote, Sliders, Reba, Malcolm in the Middle, Pyramid, Sabrina, the Teenage Witch among other series. In May 2008, she signed a contract for the CBS soap opera The Bold and the Beautiful in the recast role of Beth Logan. Her first appearance was on June 18, 2008. This marked her second daytime soap opera after originating the role of Bonnie Lockhart in the NBC daytime soap Days of Our Lives in July 2000.