The first season of M*A*S*H premiered on September 17, 1972 on CBS and concluded its 24-episode season on March 25, 1973.

This season aired Sundays at 8:00–8:30 pm on CBS.

The following six actors were listed in the opening credits: The first season of M*A*S*H also had a very large number of recurring characters: Characters marked with the symbol '‡' were seen only during the first season, and were written out of the show without explanation.

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