M*A*S*H season 8The eighth season of M*A*S*H premiered on September 17, 1979 and concluded its 25-episode season on March 24, 1980. Like season 7, this season aired Mondays at 9:00–9:30 pm on CBS.CastNote: Gary Burghoff appeared in four episodes of the season as Cpl. Walter "Radar" O'Reilly before leaving the series.Episodes