Selome Hailu editorPeacock announced that “Psych 3: This is Gus” will premiere on Nov. 18.A spinoff of the USA Network detective comedy “Psych” and a sequel to “Psych: The Movie” and “Psych 2: Lassie Come Home,” the new film will see fake-psychic detective Shawn Spencer (James Roday Rodriguez) and his friend and partner Burton “Gus” Guster (Dulé Hill) investigate the double life and estranged husband of Gus’ fiancée Selene (Jazmyn Simon).