To perform the titular alien on the ALF sitcom, Paul Fusco inserted his left hand into the head of the ALF puppet to perform the character's mouth, leaving his right hand to serve as ALF's. Underneath the trap doors and holes on the set floor, Fusco would be assisted by a second puppeteer, Lisa Buckley, who was responsible for controlling the character's left hand. From off-screen, a third puppeteer, Bob Fappiano, would operate his eyes and other facial features via remote control.