American actor and voice artist who played the Klingon cleric Koroth in The Next Generation, Captain Keogh of the USS Odyssey in Deep Space Nine and a Nezu ambassador in Voyager.
Alan Oppenheimer is an American actor with a very long list of screen and voice credits, among them the voice of Skeletor in He-Man and the Masters of the Universe and Dr Rudy Wells in The Six Million Dollar Man.
In The Next Generation's sixth-season episode Rightful Heir he plays Koroth, the cleric of Boreth who presents a clone of Kahless as the returned emperor. In the Deep Space Nine second-season finale The Jem'Hadar he is Captain Keogh, the stiff commander of the Galaxy-class USS Odyssey, who dies when a Jem'Hadar ship rams his vessel.
He completed a trio of series with the Voyager episode Rise, as the Nezu ambassador.