Question: Who developed the American television series which have "Love and Marriage" as its 20th episode of the third season?
Sentence (from "M*A*S*H (TV series)"): M*A*S*H is a 1972–1983 American television series developed by Larry Gelbart, adapted from the 1970 feature film "MASH" (which was itself based on the 1968 novel "", by Richard Hooker).
Relevant evidence: Yes