Reg E. Cathey (1958-2018) was an actor who was one of the main cast members on the CTW series Square One TV. His later television roles included recurring parts on Oz, House of Cards, The Wire, and Outcast.
Cathey appeared in such films as Penn & Teller Get Killed, What About Bob?, The Mask (with Jim Carrey), and the 2015 Fantastic Four film. In addition to his recurring television roles, he made minor appearances on such shows as Star Trek: The Next Generation, 30 Rock, Law & Order and a posthumous voice role in Disney's Rapunzel's Tangled Adventure. On stage, he often performed in Shakespeare, including as Guildenstern to Kevin Kline's Hamlet (taped for Great Performances).