Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Private Michael J. Caboose is a main fictional character in Rooster Teeth Productions'' machinima comic science fiction video series Red vs. Blue. Voiced by Joel Heyman, Caboose first appears in episode 3 of season 1 as a new recruit for the Blood Gulch Blue Team, a group of soldiers engaged in a futuristic civil war against the Red Team. Caboose is portrayed as one of the most eccentric characters in the series. Consistently shown to be mentally abnormal, his behavior varies from merely somewhat dim-witted in Season 1 to almost completely divorced from reality in Season 3 and onwards. His unusual behavior frequently earns him the scorn and disrespect of the series'' other characters. In part due to positive early fan reaction, Burnie Burns, the main writer for the series, focused the storyline on Caboose and Donut (Dan Godwin), the Red Team''s rookie.