The Immortal is an American television series, which aired on ABC from September 1970 to January 1971. The series is based on a pilot movie of the same name, which aired the year before. The pilot is based on the science fiction novel The Immortals, by James Gunn. Although the series was cancelled at midseason, episodes were rerun by ABC in the summer of 1971.

Test driver Ben Richards discovers his blood contains every immunity known to man--in effect making him immortal. When an elderly billionaire named Maitland learns of Richards' condition, he hires mercenary Fletcher to track Richards all over the country, capture him, and bring him back to Maitland's estate for periodic transfusions. The series details Richards' adventures with people he meets along the way, all the while fleeing from Fletcher and his goons. Written by Marty McKee

Through a genetic fluke, test driver Ben Richards was born with natural immunities to every known illness. Barring a fatal accident, Ben should live longer than anyone has ever lived. When an elderly billionaire discovers that periodic transfusions of Ben's blood can cure diseases, rejuvenate and extend life in others, the old man becomes obsessed with caging Ben, to use him as a personal fountain of youth. Ben escapes his captor, and is forced to stay on the run to avoid the billionaire's goons while also searching for his long-lost brother, Jason. Jason Richards may have the same kind of blood as Ben, and may face the same kind of danger. Written by Anthony Bruce Gilpin

In the 16th century or so, Raphael Cain's wife was killed by demons and his daughter kidnapped. He swore an oath to kill every demon on earth, and he and his squire Goodwin were given immortality to complete his oath. Now, in the 20th century, Cain and Goodwin team up with a para-psychologist to defeat the demons once and for all. Written by