Catlan McClelland Creator, Co-Executive Producer Matthew Schlissel Creator, Co-Executive Producer Jon Hamm Detective Marvin Flute Voice, Executive Producer Erinn Hayes Harmony Flute Voice Rachel Dratch Stan Flute Voice Alan Tudyk Dr. Rufus Pentos, Mr. Flesh Voice Kevin Michael Richardson Detective Greg Summers Voice Greg Chun Lieutenant John Kang Voice Martin Short Otis Volcanowitz Guest Voice Gail Berman Executive Producer Hend Baghdady Executive Producer Chadd Gindin Executive Producer