After landing in a mental hospital, Stuart questions whether his memories of hopping from universe to universe are the product of an overactive imagination...or psychotic illusion. Meanwhile, Kripke has a new love interest.
Think that's my check out - they failed to do anything, there was no explanation (presumably the prime universe Stuart shot was to link it, the messages are from him, as it actually gave us a version of why this whole thing is happened... but I don't care) and I didn't laugh