When a movie star’s son is killed after being chased by the paparazzi, Chloe takes a deep look into the case with a little help from Lucifer. Meanwhile, Maze and…

Supergirl, The Flash, Green Arrow and Superman engage in the battle of their lives. The crossover starts on The Flash S05E09 Elseworlds (I) and Arrow S07E09 Elseworlds (II).

When Barry Allen and Oliver Queen wake up one morning and realize they have swapped bodies with each other, the two set off to find out what disturbed the timeline…