Customer Loyalty is an episode of The Office that guest stars the Greek-Canadian comedian Christopher "Chris" Diamantopoulos.
 The episode guest stars Chris Diamantopoulos as Brian the boom mike operator, and Ben Silverman as Isaac, a coworker of Jim's. 
Christopher "Chris" Diamantopoulos (born May 9, 1975; Greek:  ""  ) is a Greek-Canadian actor and comedian. 
