Episode 1
Morpheus: The Sinister Sentinel
Another sentinel with an evil alignment and who has the power of Astrea, Hercules and Mercury combined, comes to Earth for revenge.
Where to watch Space Sentinels
TV series
Space Sentinels
19771 season8.2 / 10
Space Sentinels is a Saturday morning animated series produced by Filmation which debuted on the American NBC network on September 10, 1977 and ran for thirteen half-hour episodes. The series has been called "ahead of its time" due to its racially diverse cast of main characters. In this series, the Roman mythological figures Hercules and Mercury are joined by Astrea, a character created specifically for the series, to form a superhero team to protect mankind. The complete series was released on Region 1 DVD on August 22, 2006, along with the complete series of The Freedom Force.
Availability
Not streaming in United States
Checked Jul 22, 2026
Space Sentinels premiered September 10, 1977. We don't have a confirmed streaming, rental or purchase option yet.
Synopsis
Space Sentinels is a Saturday morning animated series produced by Filmation which debuted on the American NBC network on September 10, 1977 and ran for thirteen half-hour episodes. The series has been called "ahead of its time" due to its racially diverse cast of main characters. In this series, the Roman mythological figures Hercules and Mercury are joined by Astrea, a character created specifically for the series, to form a superhero team to protect mankind. The complete series was released on Region 1 DVD on August 22, 2006, along with the complete series of The Freedom Force.
Season 1 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
Space Giants
The Sentinels have to deal with giant tough-to-beat robots who are initially after some gold as fuel.
Where to watch Space SentinelsEpisode 3
The Time Traveller
A human from an advanced time period has returned to stop the construction of a moon base by destroying the supply rockets (unmanned) shortly after launch.
Where to watch Space SentinelsEpisode 4
The Sorceress
A large section of the north pole has vanished, and the Sentinels are dispatched to investigate.
Where to watch Space SentinelsEpisode 5
The Return of Anubis
Anubis is revived and wants to exact revenge on human beings. The Sentinels have to stop this from happening.
Where to watch Space SentinelsEpisode 6
The Wizard of Od
The Sentinels travel to an alternate universe to investigate and defeat a device that alters reality.
Where to watch Space SentinelsEpisode 7
The Prime Sentinel
Another Sentinel One-like computer, known as the Prime Sentinel, has been compromised by an evil unknown force, and the Sentinels journey into space to fix the problem.
Where to watch Space SentinelsEpisode 8
Commander Nemo
An eco-terrorist threatens civilization and the Sentinels travel into the ocean to find and stop him.
Where to watch Space SentinelsEpisode 9
Voyage to the Inner World
Astrea is kidnapped with the intent to use her to power an underground civilization against her will. Hercules, Mercury, Sentinel One and MO use their spaceship to burrow their way to the city to rescue her.
Where to watch Space SentinelsEpisode 10
Loki
A powerful human from another dimension is freed and sends Hercules and Mercury into his dimension which allows him to steal their spaceship and use it in an attempt to conquer his original dimension that he came from.
Where to watch Space SentinelsEpisode 11
Fauna
A young girl who has telepathy and can control wild animals, is attacking a laboratory in a forest. The Sentinels are dispatched to investigate.
Where to watch Space SentinelsEpisode 12
The Jupiter Spore
When an alien plant spore is brought to Earth by a returing space probe, it endangers the planet when it begins to grow uncontrollably. The Sentinels must consult a wise cosmic sage before deciding on a course of action.
Where to watch Space SentinelsEpisode 13
The Worldship
finale
A large planetoid is on a direct collision course with earth. The Sentinels come to the conclusion that the planetoid must be destroyed to save the earth, so using their spaceship, they intercept the planetoid and find out that further investigation is needed.
Where to watch Space SentinelsEpisode information updated Jul 27, 2026
Available now in United States
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More about Space Sentinels
Cast
Evan C. Kim
George DiCenzo
Lou ScheimerProduction details
- Status
- Ended
- Series type
- Scripted
- Episodes
- 13
- Original language
- English
Networks & production
NBCUnited States
Filmation AssociatesUnited States
Themes
greek mythologyherculessuperhero