His best-known science fiction appearances were in "O.B.I.T.", an episode of The Outer Limits; "The Cloud Minders", a third-season episode of Star Trek, in which he played High Advisor Plasus; and "Z'ha'dum", the third-season finale of Babylon 5, in which he played Justin, and as Caspay in Beneath the Planet of the Apes.
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He was also the voice of the villain Silvermane (in elderly form) in Spider-Man: The Animated Series.
Jeff Beck | Jeff Koons | Jeff Foxworthy | Jeff Buckley | Jerry Jeff Walker | Jeff Daniels | Jeff Bezos | Jeff Minter | Jeff Tweedy | Jeff Sagarin | Jeff Bingaman | Jeff Goldblum | Jeff Bridges | Jeff Porcaro | Jeff Hardy | Jeff Bennett | Corey Yuen | Jeff Wall | Jeff Kennett | Jeff Gordon | Jeff Jarrett | Jeff Garlin | Jeff Flake | Jeff Fisher | Jeff Coffin | DJ Jazzy Jeff | Jeff Stelling | Jeff Martin | T. Corey Brennan | Jeff Wayne's Musical Version of The War of the Worlds |
:: O.B.I.T., Season 1, Episode 7 (4 Nov. 1963), starring Peter Breck, Jeff Corey, Joanne Gilbert, Alan Baxter and Harry Townes, about a technology that can track anyone, anywhere, any time