Hoyt in 1958 was cast as a rancher, Clete Barron, in the episode "Trouble in Paradise Valley" of the syndicated western series Frontier Doctor. In 1958 and 1959 he performed in two episodes of the CBS crime drama Richard Diamond, Private Detective, appearing as Burnison in "The George Dale Case" and as Harding, Sr., in "Murder at the Mansion". Later in 1959, on NBC's Laramie western series, Hoyt portrayed a mentally troubled military officer, Colonel Brandon, in "The General Must Die". That same year he was cast as Antoine Rigaud in the episode "About Roger Mowbray" on another NBC western series, Riverboat.