Mark Hanna (January 1, 1917 – October 16, 2003) was an American screenwriter and actor. He was known for writing the screenplays for many science fictionB movies in the 1950s, particularly Attack of the 50 Foot Woman. His first major screenplay was Gunslinger in 1956. He continued to be prolific through the mid-1960s, after which his film credits become sporadic. His last screenplay was for Star Portal in 1998, five years before his death from stroke complications.[1]