Donald Sutherland portrays Hawkeye Pierce, a witty and irreverent surgeon at the 4077th Mobile Army Surgical Hospital in South Korea.
Elliott Gould plays Trapper John, a talented and mischievous surgeon who is Hawkeye's closest friend and colleague.
Tom Skerritt takes on the role of Duke Forrest, another skilled surgeon who works alongside Hawkeye and Trapper John.
Sally Kellerman portrays Maj. Margaret 'Hot Lips' O'Houlihan, the head nurse at the 4077th, known for her strict demeanor and dedication to military discipline.
Robert Duvall plays Maj. Frank Burns, a rigid and incompetent surgeon who clashes with Hawkeye and Trapper John.
Roger Bowen takes on the role of Lt. Col. Henry Blake, the commanding officer of the 4077th MASH unit, known for his laid-back leadership style.
René Auberjonois portrays Father Mulcahy, the chaplain at the 4077th, offering spiritual guidance and support to the staff.
David Arkin plays Wade Vollmer, one of the surgeons at the 4077th who works alongside Hawkeye and Trapper John.
Jo Ann Pflug takes on the role of Lt. 'Dish' Schneider, a nurse who works at the Mobile Army Surgical Hospital with dedication and compassion.
Gary Burghoff portrays Cpl. 'Radar' O'Reilly, the company clerk at the 4077th, known for his keen intuition and ability to anticipate needs before they arise.
Fred Williamson plays Spearchucker Jones, one of the surgeons at the 4077th MASH unit, known for his athletic prowess and medical skills.
Michael Murphy portrays Me Lai Marston, a character involved in the comedic and dramatic moments that unfold at the Mobile Army Surgical Hospital.
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