He established the Torchlight Project together with his wife, Joan, which aided, empowered and enriched the lives of impoverished children in foreign countries.

Born in the New Jersey township of Orange, he was the son of playwright Charles Knox Robinson II and painter Geraldine O'Loughlin.

His many TV credits include 77 Sunset Strip, Alfred Hitchcock Presents, Stoney Burke, The Alfred Hitchcock Hour, Bachelor Father, Ripcord, Laramie,[2] Wagon Train, Gunsmoke, The Virginian, The High Chaparral, Ben Casey, The Munsters, My Three Sons, Cade's County, The Sixth Sense, Mannix, Ironside, Banacek, The F.B.I., Barnaby Jones, Griff, O'Hara, U.S. Treasury, The Manhunter, The Six Million Dollar Man, Adam-12, Emergency!, Mobile One, The Paper Chase, Ellery Queen, Cannon, Flying High, The Hardy Boys/Nancy Drew Mysteries, Airwolf, Switch, Quincy, M.E., Simon & Simon, Finder of Lost Loves, Scarecrow & Mrs. King and The Equalizer.

Robinson played Richard Crenna's second in command Ensign Bordelles aboard the fictional Navy gunboat, USS San Pablo, stationed in China.

The eleventh role was in his sole theatrical feature of the decade, 1987's Death Wish 4: The Crackdown in which he played the small part of an unnamed newspaper editor.

After a passage of nine years performing in local theater and other activity, he returned to the screen in 1996, at age 64, for one small final role, that of an unnamed lawyer for Matthew Broderick's character in the black comedy The Cable Guy, where he was billed 44th in the end credits as Charles Knox Robinson, III.

He and his wife, Joan, established the Torchlight Project, which had as its purpose aiding, empowering, and enriching the lives of impoverished and abandoned children in many foreign countries.