The Old and the Restless - S2-E12
Continuity mistake: When young Shawn is sitting on the bench talking to his grandpa he has a sandwich in his hands. He starts to put it on the bench to his left, the shot changes, and it is already on the bench. Then for most of the rest of the scene it is on his right until his dad arrives and he picks it up from his left.
There's Something About Mira - S2-E11
Continuity mistake: While at the batting cages when Shawn and Gus are throwing balls at the PI, there are a couple of people playing catch in the background. They disappear the last time Shawn throws.
Gus's Dad May Have Killed an Old Guy - S2-E10
Continuity mistake: Gus' dad gives Shawn some money for Gus. As he hands it to Shawn it is a $50 bill, but after he gives it to Shawn it changes to a $20.
Continuity mistake: When Tancana is in the car with Gus and Shawn, he is leaning forward talking to them. In the very last shot he is suddenly sitting back.
Continuity mistake: In the opening scene when young Gus and Shawn are eating ice cream, the amount of ice cream keeps changing throughout the whole scene.
Meat Is Murder, But Murder Is Also Murder - S2-E6
Continuity mistake: The people in the background change in the overhead shot at the end of the episode when Gus walks away from Shawn. (00:41:55)
Meat Is Murder, But Murder Is Also Murder - S2-E6
Continuity mistake: Gus' uncle rips the postcard in half, the shot changes and he rips it in half again.
Psy vs. Psy - S2-E3
Continuity mistake: Shawn and Gus are in front of the Psych office talking about how the other psychic beat Shawn. There are two guys standing in the background, then in one shot there is only one, the next shot there are two again.
Factual error: Cops can't force someone to leave a park because they're male and have no children.
Black and Tan: A Crime of Fashion - S2-E15
Factual error: In the flashback at the beginning of the episode, Shawn is wearing a Knight Rider T-shirt. This flashback takes place in the 80's, but the art printed on the T-shirt is a picture-perfect copy of the cover art from the US DVD release of Knight Rider Season 3 - this DVD set (and the cover art style/arrangement) was not released until 2006: http://en.wikipedia.org/wiki/Knight_Rider_%28season_3%29.
Visible crew/equipment: When Dwayne Tancana is about to jump off the boat, his mic gear is seen tucked in his belt. (00:21:00)
Chosen answer: "Psych: The Musical" was supposed to air during the regular season 7 schedule, before Chief Vick is suspended and Jules discovers Shawn's lie, but the network decided to push it back to air as a special episode, sort of as a tie in with the holiday season and a lead in to season 8, which was to begin only a couple of months later.