The Rifleman as Sam Morley in S1 E24 "The Trade" (1959), Have Gun–Will Travel, Highway Patrol (1956), Zorro, Johnny Ringo, The Rebel, Zane Grey Theatre, Tombstone Territory, Black Saddle, Gunsmoke, Bonanza, The Untouchables,Trackdown, Rawhide, The Virginian, The Loner, and The Guns of Will Sonnett.

In the 1955 episode "The Big Bird," Richards played Phil Baurch, who stole from people's homes after being hired out to do yard work.

In the March 3, 1961 episode “An Absence of Tears” on the popular TV show Route 66, he did a turn as a mob connected bad boy and ex-love to a blind girl looking for revenge against mobsters who murdered her Honeymoon Husband.

“He also appeared in Dan Raven, a crime drama, and the anthology series The Lloyd Bridges Show in the 1962 episode "Testing Ground".

Richards guest-starred in 1960s and 1970s television series, including Burke's Law, I Spy, Mannix, Banacek, McMillan and Wife, and three appearances on The Mod Squad between 1969 and 1972.

Richards narrated the Academy Award-nominated documentary "Monument to the Dream" about the construction of the Gateway Arch in St. Louis, Missouri.

[2][15] On December 10, 1974, Richards died from cancer in Los Angeles,[4] survived by his wife, as well as his mother Edith Grossman and his sister, Mrs. Howard Gluck.