Thurop Van Orman Flapjack, Delinquent No. 2 Voice, Writer, Writer Brian Doyle-Murray Captain K'nuckles Voice Roz Ryan Bubbie Voice Jeff Bennett Peppermint Larry, The Inventor Voice Greg Baldwin Constable, Sir Pattington Guest Voice Steve Little Pirate Captain Voice, Writer, Writer S. Scott Bullock Kid Nickels, Charles, Lord Nickelbottoms, Gambler No. 3 Guest Voice Antoinette Spolar Ms. Leading, Kid No. 2, Kid No. 3 Guest Voice Richard McGonagle McGee, Announcer Guest Voice Grey DeLisle Flirtatious Lady, Gertrude, Tickled Lady Guest Voice Kevin Michael Richardson Gambler No. 2, Psycho, Cop Guest Voice Daran Norris Snark No. 2, Creaky Board-Hinge, Head Gentleman Guest Voice Kent Osborne Delinquent No. 1, Artist Kid Guest Voice, Writer, Writer Jackie Buscarino Sally Syrup Guest Voice, Writer Dee Bradley Baker Cat, Fish Head Monsters Nos. 1 & 3 Guest Voice Billy West Pun Pirate No. 3, Sailor Guest Voice Cree Summer Diver, Buff Delinquent Guest Voice Pendleton Ward Sail Boss, Rower No. 1 Guest Voice, Writer J.K. Simmons Poseidon Guest Voice Adrián Viador Flapjack Guest Voice Mike Roth Writer J.G. Quintel Writer, Writer John Infantino Writer Alex Hirsch Writer Brett Varon Writer Ghostshrimp Writer Patrick McHale Writer Cindy Morrow Writer Somvilay Xayaphone Writer Charlie Adler Voice Director