Blackstar was an animated series which aired on CBS.
Opening: John Blackstar, astronaut, is swept through a black hole, into an ancient alien universe. Trapped on the planet Sagar, Blackstar is rescued by the tiny Trobbit people. In turn he joins their fight for freedom against the cruel Overlord, who rules by the might of the Powerstar. The Powerstar is split into the Powersword and the Starsword. And so with Starsword in hand, Blackstar, together with his allies, sets out to save the planet Sagar. This is his destiny. "I am John Blackstar."