Complex sentence: He is married to actress Wanda Ventham, with whom he appeared in Series 2 of BBC drama "The Lotus Eaters" in 1973 and as Sherlock Holmes's parents in Series 3 Episode 1 of the BBC series Sherlock.
Split into simpler sentences: He is married to actress Wanda Ventham, with whom he appeared in Series 2 of BBC drama "The Lotus Eaters" in 1973. He and his wife appeared as Sherlock Holmes's parents in Series 3 of the BBC series Sherlock.