It’s part three of the Karb-Brak story in Action 462 (Aug. 76), by Bates, Swan and Blaisdel.
Superman is not sure what to do about the very allergic alien, but he isn’t going to leave Earth because of him. The disease moves into its second phase, and begins causing warping of people and matter around him.
The next phase reduces Karb-brak to a clump of flying blobs, as he approaches death. He does manage to get Superman spinning around, and adds to his momentum, which removes Superman from this time period.
Karb-Brak doesn’t much care where Superman is, as long as he is fine. But we see Clark on the streets of revolutionary Philadelphia.
The story concludes in the next issue.
Bridwell, Swan and Al Milgrom give Krypto his first solo story in about five years in this issue.
Krypto comes to Earth, searching for Superman, who has called for him. He finds a phony, working as muscle in a protection racket, but gets rid of him.
Krypto has been asked to be in a dog food ad, with the proceeds going to charity, so Superman called for him. Pimping our your dog, ok. Krypto prefers the can to the food, in a moment I liked.