In Season 3, Barry (Grant Gustin) must deal with the consequences of his decision to interfere in the timeline and save his mother. The rise of a new metahuman who knows about the existence of "Flashpoint" leads to people gaining powers to become their alternate selves. Barry must come clean when self-proclaimed speed god Savitar threatens the life of Iris (Candice Patton). As Caitlin (Danielle Panabaker) fears she will succumb to her Killer Frost urges and Cisco (Carlos Valdes) struggles to forgive Barry for the loss of his brother, the team begin to fall apart. With a newly powered Wally (Keiynan Lonsdale) stepping up to help Barry and Julian (Tom Felton) and being brought into the fold to assist Caitlin, it becomes a race against the clock to stop the devastating future Barry has seen. Episode 8 is part of a crossover event with sister shows "Supergirl," "Arrow" and "Legends of Tomorrow." Episode 17 is a musical crossover with "Supergirl."