R. Lee Ermey

Ronald Lee Ermey was an American actor and Marine corps drill instructor. He achieved fame when he played Gunnery Sergeant Hartman in the 1987 film Full Metal Jacket, which earned him a Golden Globe Award nomination for Best Supporting Actor. Ermey was also a United States Marine Corps staff sergeant and an honorary gunnery sergeant.

SCRUBSS1, E19

My Old Man

While Elliott (Sarah Chalke) and Turk's (Donald Faison) parents pay a visit to see them present at a medical conference, J.D.'s (Zach Braff) father Sam (guest star John Ritter, "Three's Company") makes a surprise visit, leaving all three interns in a state of emotional distress as old parental behaviors come into play. Meanwhile, Carla gets the biggest shock of them all when she discovers she is exactly like Turk's mother (guest star Hattie Winston). John C. McGinley and Ken Jenkins also star. Markie Post also guest stars as Elliott's mother, Lily.
HOUSES2, E5

Daddy's Boy

Trust issues between a father and his mysteriously ill son prevent the medical team from getting the information they need to diagnose and treat the illness.
THE X-FILESS3, E11

Revelations

Mulder and Scully must protect a child from a serial killer with a penchant for murdering those claiming to suffer from religious wounds.
HOUSES5, E4

Birthmarks

After receiving word that his father has passed away, House is coerced into attending the funeral; the team tries to diagnose the illness of a woman who was in China searching for her birth mother.