[citation needed] Campbell has made several appearances in television shows, made-for-TV movies, miniseries, and specials.

The 1990s saw him appearing in popular series L.A. Law, Touched by an Angel, Melrose Place, and Walker, Texas Ranger.

[3][4] On stage, Campbell played the Viscount de Valvert in the 1973 musical Cyrano, and appeared in The Philadelphia Story, which ran from 1980 to 1981 at the Vivian Beaumont Theater.

In 1981 he starred as Macduff in the Broadway revival of William Shakespeare's Macbeth at the Vivian Beaumont Theater, alongside Philip Anglim, Maureen Anderman, and Kelsey Grammer.

[3] His Broadway credits included The Boys of Winter (1985), The Caine Mutiny Court-Martial (1983), The Philadelphia Story (1908), The Freedom of the City (1974), and Cyrano (1973).