In 1962 Harlan’s work began selling to Hollywood, writing screen plays for shows such as The Outer Limits, Burke’s Law, The Man From U.N.C.L.E, and most notably
The City On The Edge of Forever written for Star Trek. After these successes he went on to co-write and direct The Oscar(1966) which audiences did not receive well. In 1965 Harlan marched in the second and third Selma to Montgomery marches with Martin Luther King Jr. and in the same year published Repent, Harlequin! Said the Ticktockman which later won a Nebula, Hugo, and Prometheus Hall of Fame award. In 1967 Harlan published I Have No Mouth and I Must Scream which won a Hugo a year later. In the same year he edited the Dangerous Visions anthology, drawing attention to the SF genre through its controversial works written by 20 award winning (or soon to be) authors. In 1968 he wrote the tv column series The Glass Teat which was later collected into two anthologies in 1970 and 1975: The Glass Teat: Essays of Opinion on Television and The Other Glass Teat. A year later A Boy and His Dog was published and won a Nebula.