8. George needs a pay phone again
“The Boyfriend,” Season 3, Episodes 17 and 18
At the end of season three, George lies to Mrs. Sokol at the unemployment office, telling her he is close to a job with the made-up “Vandelay Industries,” and gives her Jerry’s number. He leaves the office and urgently needs to get in touch with Jerry so that Jerry can be in on the lie. In his haste, he throws a small child out of a phone booth. The kid comes back with a cop. Mobile phones, again, would’ve prevented the whole children-being-harmed thing.
9. Kramer is hours late picking up Jerry and Elaine in Long Island
“The Stranded,” Season 3, Episode 10
This one might actually still happen; it depends on your willingness to believe in Kramer’s ability to follow GPS directions, have a GPS, or have a smartphone directing him, especially since any of these might have blown out of his convertible like the written directions he was supposed to be following.