The title suggests that Professor Amos Shute’s intrepid travelers are going back in time to four planets that are identical in every way to our own, but then again, perhaps those four planets were merely at earlier times to begin with. We won’t say one way or another, but we are glad that the Spanish Flu pandemic, World War I, World War II, and World War III were all averted on some Earth.

Of the 43 children born 1 October 1989 with no gestation period, the eccentric and sometimes cruel billionaire Reginald Hargreeves brought up seven of them and turned them into the super-powered group called the Umbrella Academy when they developed powers. Nearly thirty years later, after Hargreeves dies, the five surviving members of the group gather at their family home. Oh, and: Number Six died some time ago and only Number Four can see him; Number Five disappeared about seventeen years ago, but he’s back (and in his 13-year-old body) after living 45 years in a post-apocalyptic future that’s scheduled to start in eight days.