Gus' Dad May Have Killed an Old Guy

S2 E10: When Shawn and Henry are invited to have Christmas dinner with Gus' parents (guest stars Phylicia Rashad and Ernie Hudson), the yuletide cheer is interrupted by ... murder. A neighbor is found dead and all the evidence points to Gus' dad as the culprit. Can Shawn and Gus work their usual magic when the case is so personal?