In the late 1960s, he appeared in a leading role as Vincent in the World War II drama series "Manhunt" on LWT and various episodes of "The Avengers". He also had a part in the "Doctor Who" serial "The Ice Warriors" as Leader Clent. He featured in an episode of sci-fi drama "Undermind" (1965), and the dystopian "The Guardians" (1971), and starred in the mystery mini-series "Melissa" (1974) as an out of work writer whose wife goes missing. Barkworth also played the expatriate British novelist Hugh Neville in the episodes "Guilt" and "Lost Sheep" of Secret Army (1977).