9. The Flash, season 6 – October 8, 2019

Barry Allen, AKA Flash, is back for another season…but for how long? With the ‘Crisis on Infinite Earths’ crossover episode about to hit the Arrowverse, it could be time to say goodbye to everybody’s favourite speedy superhero. Make sure you don’t miss his return, and quite possibly his demise, on The CW on the 8th October.