This is Danny Boyle's fantasy cum romcom that ponders what the world would be like if all traces of the Beatles were gone except in the mind of one man. This quickly leads to a number of whatabout questions that the writers sort of handle by also erasing one Beatlesque band (no Wilf, not the Monkees; no, not Badfinger). This is amusing and lighthearted and, of course, there are Beatles tunes to recall.
And Ed Sheeran, dude, don't quit your day job.
Kate McKinnon, do you have any range beyond your usual albeit funny SNL shtick?