Doctor 1 (The Lost Mattress)
Dr. Sileen is Bill's Doctor, mentioned in SpongeBob's Last Stand. He is seen in The Lost Mattress when he tells the Doctor, opperating on Eugene Krab, to move him out of the snack bar. He is green, with a white doctor's outfit, a Stethischope, and an operation light, on his head, along with a matching Hat.