Space Sentinels (originally named The Young Sentinels until it was renamed partway through the season) is a 1970s cartoon series made by Filmation for NBC. The story tells the tale of three heroes — Hercules, Mercury and Astrea — who have been taken out of their timestreams to a faraway world to protect mankind there. The series was well known for being ahead of its time due to the inclusion of two Token Minority characters, forming its own Token Trio.