T ake a sneak peek of PSYCH Season 4 Episode 7 "High Top Fade Out" airing this Friday September 25 at 10pm on USA. Episode Synopsis: PSYCH "High Top Fade Out" Season 4 Episode 7 - Gus' reunion with two members of his college a cappella quartet, with whom he's estranged, at the funeral of the fourth leads to a case for Shawn when they ask him to prove that "Diddle" was murdered.