(written from a Production point of view)
Weston has appeared on numerous television Westerns, including Lawman (in an episode with Ian Wolfe), Riverboat (two episodes – one with Charles Cooper, another with Arthur Batanides), The Rifleman (featuring Paul Fix and Bill Quinn), Maverick, Cheyenne (two episodes, including one with Richard Webb), Temple Houston (starring Jeffrey Hunter), Destry (in an episode with George Murdock), and Gunsmoke (with Roy Jenson and Charles Seel). He has also be seen in multiple episodes of Have Gun - Will Travel, a western series on which Star Trek creator Gene Roddenberry served as writer. Weston and his "Devil in the Dark" co-star Ken Lynch guest-starred in one episode of this series, entitled "Fight at Adobe Wells", which aired in 1960. Weston appeared in two other episodes the following year, one with Perry Lopez and another with John McLiam and Ed Peck.
Another western on which Weston appeared frequently was The Virginian. Weston also worked alongside Ken Lynch on an episode of this series entitled "The Exiles", which aired in 1963. Another episode, 1964's "The Hero", teamed him up with fellow TOS guest actors Steve Ihnat and Warren Stevens; yet another, 1965's "The Brothers", saw him appear with Hal Baylor, Robert Lansing, and Bill Quinn.
Weston has appeared on other series besides those of the western genre, however. He made frequent appearances on the crime series 77 Sunset Strip, and has also guest-starred on Wanted: Dead or Alive (with Lawrence Dobkin), Alfred Hitchcock Presents (including one episode with Clegg Hoyt and Ricardo Montalban), 87th Precinct (starring Robert Lansing), Surfside 6 (including an episode with Bert Remsen), and The Outsider.
His film career, on the other hand, consists entirely of westerns. His first film was 1963's Savage Sam, a family adventure from Disney starring Brian Keith. This was followed three years later with a role in Stagecoach and in 1967 with a role in Rough Night in Jericho. This latter film also starred Next Generation guest actress Jean Simmons. His last two films were Barquero in 1970 and Hot Lead and Cold Feet in 1978, both featuring Ed Bakey.