The Immortal is an American television series, starring Christopher George as a man whose blood chemistry and resistance to almost all diseases (including old age) makes him both almost immortal and a target of several wealthy men who would use him as a personal blood bank, aired on ABC from September 24, 1970, to January 14, 1971. The series is based on a pilot film of the same name, which aired on September 30, 1969, as an ABC Movie of the Week. The plot is based on the 1964 science fiction novel The Immortals, by James Gunn.

The series music was composed by Dominic Frontiere, who is primarily known for scoring the sci-fi anthology series The Outer Limits. Although The Immortal was canceled at midseason, episodes were rerun by ABC in the summer of 1971. It was later rerun on the American Forces Network in Europe in the 1980s and on the Sci Fi Channel in the 1990s.