He portrayed Deputy Johnny McKay opposite John Russell as Marshal Dan Troop in the 1958 to 1962 ABC-Warner Brothers western television series Lawman and Texas Ranger Chad Cooper on NBC's Laredo from 1965 to 1967.

[3] Brown served in Alaska with the U.S. Army's 2nd Infantry Division where he entertained his fellow troops by writing, directing, and acting in plays.

[5] As a contract player for Warner Bros., Brown appeared in the theatrical film Darby's Rangers (1958) with James Garner and Stuart Whitman.

He also appeared in the 1962 films Merrill's Marauders, which was co-written and directed by Samuel Fuller starring Jeff Chandler, and Red Nightmare with Jack Kelly.

Brown appeared in dozens of other television shows and did several crossovers with other western series as Johnny McKay, including Maverick, in the 1961 episode "Hadley's Hunters".

After his contract with Warner Bros. lapsed, Brown made two films for Walt Disney Studios; Summer Magic with Hayley Mills and Burl Ives and A Tiger Walks.