Dr. Gilbert Marty "Gill" Gilliam is a well known doctor in Bikini Bottom who helped Gary get rid of a splinter in his foot. He is usually seen whenever someone gets sick or has an accident. He is almost always purple, except in the episode "Once Bitten", he is orange. He has appeared in many episodes. Most of the time, he usually treats the main character of a certain episode. Dr. Gill Gilliam works at the Bikini Bottom Hospital. There he has treated many patients, and because he has helped so many people, it is possible that he has his own ward or office.