Appearing in "Back to the Stone Age!"
- Grey Gargoyle (Appears in flashback and main story)
- Margot Neil (Single appearance)
- Thor (Only in flashback)
- Sif (Only in flashback)
- Fandral (Only in flashback)
- Fee-Lon (Only in flashback)
- Senator Fleckner
- Senator Reischel
- Senator Roosevelt
Synopsis for "Back to the Stone Age!"
- Synopsis not yet written.
- Write your own review of this comic!
- Discuss Avengers Vol 1 191 on the forums
- Images from Avengers Vol 1 191
- The Grey Gargoyle previously appeared last issue and will appear next in Amazing Spider-Man #219.
- First and only known appearance to date besides flashbacks