[6] Shortly thereafter, Macready suffered a disfiguring injury in a car accident, which, as the actor would later note, proved a mixed blessing: affording him a reliably steady supply of jobs, but only within a rigidly circumscribed range.

Stanley Kubrick's antiwar film Paths of Glory (1957) provided Macready with his other great role, the sadistic and self-serving French World War I General Paul Mireau, who is brought down by Kirk Douglas's character, Colonel Dax.

Macready made four guest appearances on Raymond Burr's Perry Mason, including the role of murder victim Milo Girard in the 1958 episode "The Case of the Purple Woman".

He was also cast regularly in such series as Four Star Playhouse, General Electric Theater, The Ford Television Theatre, Alfred Hitchcock Presents, Adventures in Paradise and The Islanders.

Macready performed in a variety of television series produced in the 1950s and 1960s, including many Westerns such as Bat Masterson, Bonanza, The Dakotas, Gunsmoke, Have Gun - Will Travel, The Rebel (once in the role of Confederate General Robert E. Lee), The Rifleman, Lancer, Laramie, Riverboat, The Rough Riders, Chill Wills's Frontier Circus, The Texan and Steve McQueen's Wanted: Dead or Alive.

Also on TV, he was seen in episodes of The Outer Limits, The Twilight Zone, Boris Karloff's Thriller, Kentucky Jones, Get Smart with Don Adams, and The Man from U.N.C.L.E.

Macready was cast as Cyrus Canfield, a vengeful father searching for his runaway teenage daughter, played by Floy Dean, in the May 26, 1962, series finale of NBC's The Tall Man.

'We rented a hole in the wall next door to Martindale's book shop and a very popular bar, figuring correctly that we'd catch a mixed clientele of erudites and inebriates.'