M*A*S*H season 1

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.

Cast
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.