context: Waved through the guard shack we parked and entered a building . We made an immediate left turn down a short hall and a right turn through a door marked closed set . The AM Los Angeles set was against the left wall of the studio , and the Eyewitness News set was opposite on the right . Regis appeared on both sets , as he was the movie reviewer for Eyewitness News in those years in addition to hosting AM Los Angeles .
question: What may have caused Regis to appear on both sets ?
reference: He was a star for each one .
candidate: He was a movie reviewer for AM Los Angeles.