When an Avenger group visits SHIELD's special prison in the Negative Zone, they soon find themselves under siege by a mysterious enemy.
Released: Jan 01, 1970
Runtime: 00:22:14 minutes
Genre: Action & Adventure, Animation, Sci-Fi & Fantasy, Family
Stars: Eric Loomis, Brian Bloom, Rick D. Wasserman, Colleen O'Shaughnessey, Chris Cox, Fred Tatasciore, Wally Wingert, Alex Désert, Gabriel Mann, Jennifer Hale, Peter Jessop