Factual error: Admiral Burkley, Kennedy's physician, is depicted wearing the insignia of a full admiral (one wide and three narrow rings) and the star of a line officer above his cuff rings. In actual fact, Burkley was a rear admiral (one wide and one narrow ring) and medical officers wear an oak leaf above their rank rings.
The Kennedys (2011)
1 factual error in show generally - chronological order
Starring: Greg Kinnear, Tom Wilkinson, Katie Holmes, Barry Pepper
A Father's Great Expectations - S1-E1
Factual error: When JFK leaves to become a PT-boat commander he is wearing full lieutenant's rank insignia. He was actually a lieutenant junior grade when he took command of PT-109.