J.K. Simmons stars as Howard Silk, a UN agent in parallel Earths. Series created by Justin Marks, produced by multiple studios. Filmed in Los Angeles and Berlin, with production continuing in Berlin. Amy Berg served as showrunner until season two
Film follows Brendan and Claire, who discover their daughter Sam drowned. Brendan and his family discover false memories about Sam's doll. They discover parallel universes and Sam's existence in one. Brendan discovers universe is a computer simulation. Brendan and his wife develop program to interrupt simulation
Multiverse is hypothetical set of all universes containing all physical phenomena. Concept dates back to ancient Greek philosophers like Anaximander. William James first used term "multiverse" in 1895
Some scientists believe our universe might be infinite and contain parallel realities. Parallel worlds could be located above, below, or to the side of current reality
Ulrich Nielsen travels through time to find his son Mikkel in 1986. Katharina Nielsen searches for Mikkel in 1986 after Ulrich's disappearance. Hannah Kahnwald becomes a villain in both 1986 and 2019. Jonas Kahnwald travels through time to prevent the apocalypse. Martha Nielsen dies in 2020, but is saved by Jonas in 2019
Last surviving member of Furude clan and reincarnation of Oyashiro. Serves as "queen carrier" for Hinamizawa Syndrome research. Volunteers for Irie Clinic experiments despite mother's opposition