He did.
William Marshall played the role of Thomas Bowers in a 1964 episode of Bonanza.
William Horace Marshall 19th August 1924 - 11th June 2003 the American actor, director, and opera singer [bass] portrayed 'Thomas Bowers' the travelling opera singer in Bonanza.
No, Candace Bergen was not on a Bonanza episode.
no
Below is a link to the full cast and crew of the Bonanza episode The infernal Machine.
William Marshall played the role of Thomas Bowers in a 1964 episode of Bonanza.
William Marshall played the role of Thomas Bowers in a 1964 episode of Bonanza.
William Horace Marshall 19th August 1924 - 11th June 2003 the American actor, director, and opera singer [bass] portrayed 'Thomas Bowers' the travelling opera singer in Bonanza.
No, Candace Bergen was not on a Bonanza episode.
no
Below is a link to the full cast and crew of the Bonanza episode The infernal Machine.
Imdb has photos for each episode of the series.
no
No, Barbara Eden wasn't on any episode of Bonanza
Blessed Are They, Season 3 Episode 30.
Desperate Passage was the name of the episode
I could not find his name for that episode.