Besides this episode still don't have an airing date we have some scoops from this. The name from the episode is: "The Amazing Psych Man & Tap-Man, Issue #2" where Shawn and Gus think that a new cop (Joey McIntyre) is the masked vigilante known as the Mantis.
"Shawn and Gus investigate the whereabouts of a mysteryous, masked vigilante named The Mantis who is trying to keep down a local drug syndicate called The Caminos. The SBPD is also trying to take down The Camino Syndicate, however The Mantis seems to always be one step ahead of everyone's game. Guest Star: Joey McIntyre and Miles Fisher. "