Andrew "Andreas" Katsulas (May 18, 1946 – February 13, 2006) was an American actor known for his roles as Ambassador G'Kar in the science-fiction television series Babylon 5, as the one-armed villain Sykes in the film The Fugitive (1993), and as the Romulan Commander Tomalak on Star Trek: The Next Generation. He also played Vissian Captain Drennik in the Star Trek: Enterprise episode "Cogenitor".
In early 2005, Katsulas, who in the words of Babylon 5 creator J. Michael Straczynski, "loved smoking with a passion that cannot be described" was diagnosed with incurable lung cancer. Shortly before his death, he invited Straczynski, Peter Jurasik, and Douglas Netter to his house for one last dinner, during which he persuaded Straczynski to tell him all the secrets about the making of Babylon 5 that had been kept from the public, saying, "Who am I going to tell?"
Katsulas died on February 13, 2006, at the age of 59. He was survived by his wife and two children.