- Script
- Roy Thomas (credited)
- Pencils
- John Buscema (credited)
- Inks
- George Roussos (credited as George Bell)
- Colors
- ?
- Letters
- Jerry Feldmann (credited as Jerry Mann)
- First Line of Dialogue or Text
- Heads up, my fellow Avengers!
- Feature Logo
- Genre
- superhero
- Characters
- The Avengers: Captain America [Steve Rogers] (featured); Goliath [Hank Pym] (featured); Hawkeye [Clint Barton] (featured); Quicksilver [Pietro Maximoff] (featured); Scarlet Witch [Wanda Maximoff] (featured); Wasp [Janet Van Dyne] (featured)
Black Widow [Natasha Romanoff] (supporting); General Brushov (villain) (introduction); Hercules (guest); The Hydra (hallucination); Colonel Ling (villain); Red Guardian [Alexi Shostakov] (villain) (introduction); Ebeneezer Wallaby; Bruiser Bates
- Universe
- Marvel : mainstream
- Reprints
- in Hit Comics (BSV - Williams, 1966 series) #86
- in Los Vengadores (Ediciones Vértice, 1969 series) #19 ([Marzo] 1971)
- in Il Mitico Thor (Editoriale Corno, 1971 series) #51 (13 Marzo 1973) [pages 1-16], #52 (27 Marzo 1973) [pages 17-20]
- in Die ruhmreichen Rächer (BSV - Williams, 1974 series) #42 ([August 1976])
- in Marvel Triple Action (Marvel, 1972 series) #35 (May 1977) [minus pages 10 and 16]
- in Submariner (Arédit-Artima, 1976 series) #8 (avril 1978) [N&B et remonté [B&W and reframed]]
- in Marvel Superheroes [Marvel Super-Heroes] (Marvel UK, 1979 series) #380 (December 1981) [Page 16 edited out Black & white.]
- in Los Vengadores (Novedades, 1981 series) #43 (24 de diciembre de 1981)
- in Essential Avengers (Marvel, 1999 series) #2 ([November] 1998) [black and white]
- in Marvel Masterworks: The Avengers (Marvel, 2003 series) #5 (2005)
- in Avengers : L'intégrale (Panini France, 2006 series) #1967 (mai 2009)
- in Marvel Gold. Los Vengadores: ¡Unidos en Combate! (Panini España, 2012 series) (Marzo 2012)
- in Marvel Masterworks: The Avengers (Marvel, 2009 series) #5 ([June] 2013)
- in The Avengers Omnibus (Marvel, 2012 series) #2 (2015)
- in Black Widow Epic Collection (Marvel, 2019 series) #1 - Beware the Black Widow (2019)
- in The Black Widow Strikes Omnibus (Marvel, 2019 series) (2019)
- in True Believers: Black Widow - Red Guardian (Marvel, 2020 series) #1 (December 2020)
- in The Avengers Omnibus (Marvel, 2012 series) #2 [Second Edition] (2023)
Introduction of the Red Guardian, the Black Widow's husband.
- Script
- Roy Thomas ?
- Pencils
- John Buscema (illustrations)
- Inks
- George Roussos (illustrations)
- Colors
- ? (illustrations)
- Letters
- typeset
- Characters
- The Avengers: Goliath [Hank Pym]; Hawkeye [Clint Barton]; Quicksilver [Pietro Maximoff]; Scarlet Witch [Wanda Maximoff]
Hercules
- Reprints
Letters from: Alvin Grinage Jr., William P. Sturdevant, Scott Ruhe, Nils Osmar, Pat Breene, and Steve Bowell; includes M.M.M.S. membership form, and illustrations from The Avengers (Marvel, 1963 series) #42, page 2, 1st panel (Hawkeye and Hercules), page 10, 2nd panel (Hercules), page 13, 4th panel (Hawkeye and Goliath), page 14, 3rd panel (Avengers), 4th panel (Quicksilver).