(written from a Production point of view)
James Horan (born 14 December 1954; age 58) is an actor who has appeared in all four Star Trek spin-off television series, Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager, and Star Trek: Enterprise. In addition he lent his voice to the video games Star Trek: Klingon Academy and Star Trek: Starfleet Command III.
He is well-known for his guest appearance on the hit science fiction television series Highlander, as the evil Immortal named Grayson in the first season episode entitled "Band of Brothers" (1993). He had a recurring role on Zorro (1992), starring Duncan Regehr and also made guest appearances on Baywatch, Melrose Place, Walker, Texas Ranger (with Noble Willingham), Charmed, and Lost.
In 1994, he co-starred with Louise Fletcher in the made-for-television movie The Haunting of Seacliff Inn. His film credits include Chattanooga Choo Choo (with Christopher McDonald, Davis Roberts, and Bill Zuckert), Scanner Cop (1994, with Mark Rolston), Counter Measures (1999, with Scott Marlowe), and the epic Gods and Generals (2003, with Kevin Conway, Robert Easton, W. Morgan Sheppard, and Andrew Prine).
Currently, he mostly supplies voices for video games, including Ghost Recon, Freelancer, Star Wars: Knights of the Old Republic, Everquest II, Warhammer 40,000: Dawn of War II, and its expansion packs Chaos Rising, and Retribution. He has a recurring role as Wheeljack on Transformers: Prime, executive produced by Roberto Orci and Alex Kurtzman, co-starring with Jeffrey Combs, Tania Gunadi, Frank Welker and Tony Todd.