The episode ends with the reveal that the team needs a power source stronger than the sun to fuel the Speed Force Bazooka—specifically, a Dominator crystal guarded by King Shark .
The two share a kiss that helps Tracy finalize the design for the "Speed Force Bazooka". Episode Details Season/Episode: Season 3, Episode 21 Original Air Date: May 9, 2017 Writers: Judalina Neira & Lauren Certo Director: David McWhirter The_Flash_2014_3x21_Causa_Ed_Effetto_ITA_1080p_...
The episode shows brief glimpses of Caitlin Snow fighting to regain control from her Killer Frost persona, particularly after a heartfelt moment with Cisco. The episode ends with the reveal that the
To save the city from a new threat (Heat Monger), the team works with Killer Frost , who returns to S.T.A.R. Labs because Savitar's memory loss makes him useless to her. Barry’s memories are ultimately restored when Iris recounts the emotional story of the night his mother died. Key Character Developments To save the city from a new threat