Appearing in "Brain-Child to the Dark Tower Came...!"
- Squadron Supreme
- Brain-Child (First appearance)
- "Monstruous humanoid"
- "Giant amoeba"
- Harold Sutton(First appearance)
- Nighthawk's jet
Synopsis for "Brain-Child to the Dark Tower Came...!"
- Synopsis not yet written.
- Lein Wein was not credited in the original book but was named as co-plotter by Roy Thomas in the introduction of Marvel Masterworks: The Avengers # 9
- The title of the story is inspired by the poem "Childe Roland toe the Dark Tower came" by english author Robert Browning; the poem is mentioned by Dr. Spectrum
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