Obviously, something big went down in that other dimension.  For the whole story, check out the backup tale “Captain Spectacular and Star Maiden in the Inevitable Dimension” in the second SuperFogeys book.  It’s drawn by Julio Molina-Muscara, artist on “Omega Chase.”
I wanted a “no bad guy” break-up here.  I think you get where everyone is coming from and you should be thinking you might have done the same thing in the Captain’s shoes.  Maybe not.  Not all the readers bought the “no bad guy” thing.  Don’t know how many read the backup story though.
And, yes, that is the first mention of Spy Gal’s real name.