Dr. Forrest (Rodger Bumpass) is a Bikini Bottom doctor. His name is revealed in "Slide Whistle Stooges" and "Shuffleboarding". He is most often purple-skinned, but he has occasional appearance changes throughout the series. In the episode "Once Bitten", an orange-skinned guest doctor who resembles Dr. Forrest named "Dr. Gill Gilliam" appears