[2] Beddoe gained much theatrical experience playing in stock theater in Boston, Massachusetts, and Philadelphia, Pennsylvania.

[1] He made his Broadway acting debut in 1929, receiving top billing (over a young Spencer Tracy) in Nigger Rich.

[3] His other Broadway credits include Penny Arcade (1930), The Greeks Had a Word for It (1930), Sing High, Sing Low (1931), The Warrior's Husband (1932), Man Bites Dog (1933), The Blue Widow (1933), Birthright (1933), The Sky's the Limit (1934), Nowhere Bound (1935), First Lady (1935), Father Malachy's Miracle (1937), and Winged Victory (1943).

In the 1950s and 1960s, he made four appearances on Father Knows Best Have Gun – Will Travel, three on Lawman, three on Maverick, three on Laramie, three on Lassie, one on Mr. Adams and Eve, and three on Perry Mason including in the 1958 episode 'The Case of the Buried Clock'.

In 1984, he made his final television appearance as Kris in NBC's Highway to Heaven starring Michael Landon and Victor French.