# Captain Marvel (1968) #21

Published: 1970-08-01T00:00:00+0000
Series: Captain Marvel (1968 - 1979)
Creators: Gil Kane (penciler), Dan Adkins (cover artist), Roy Thomas (writer), Art Simek (letterer)

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Bruce Banner agrees to help Mar-Vell escape the Negative Zone, but becomes enraged and turns into the Hulk!