Eclipso is the main antagonist of season 2 of the CW and DC Universe television series Stargirl. He is a dark cosmic entity who feeds on everyone's fears and inner darkness defeated by the JSA in the past. However, he returns to face Courtney Whitmore's incarnation of the team.
He resumes his plot to combine both the human world and the Shadowlands, plotting to take control of Stargirl's cosmic staff and combine dark and light to do so. However, Eclipso is killed by Thunderbolt when Jakeem Willaims asks for his friend to turn him into toast.