David Harbour broke down his decision to put on a prosthetic for his dark comedy DTF St. Louis. In the new HBO show, which premiered on Sunday, March 1, Harbour, 50, plays Floyd, who is involved in a complicated love triangle with wife Carol (Linda Cardellini) and coworker Clark (Jason Bateman). Floyd is self-conscious when viewers meet him in the pilot - especially after he gained weight in recent years, which called for Harbour to wear a fake stomach.