Marvel Double Feature #20 was published by Marvel Comics on January 1, 1977, as part of a series that began in 1973. Stan Lee writes, and art comes from Dave Cockrum, Frank Giacoia and Jack Kirby. This 36-page issue features Captain America, Nick Fury, Black Panther, Dum Dum Dugan and Sharon Carter, among 8 characters cataloged on VerseDB.