The New and Improved Carl Morrissey - S1-E2
Character mistake: The advertising leaflet for the cemetery misspells it "cemetary" on the front cover.
Character mistake: When Collier is meeting all the 4400s at the reunion, Shawn calls Isabelle Maia by mistake. (00:31:10)
Factual error: In episode 17 there are some scenes showing sick 4400s all around the world. One of them is being carried into an ambulance car in Frankfurt, Germany. The ambulance car's number plate begins with the letters FM meaning Frankfurt am Main. The correct abbreviation for Frankfurt am Main on German number plates is F - not FM.
Jordan Collier: Close your mouth, Shawn... you'll draw flies.