The Flash Season 4 Episode 16 Run, Iris, Run

Barry's wife Iris West-Allen steps up and becomes Central City's newest speedster as a new metahuman villain named Melting Pot transfers her powers to Iris during a battle with Team Flash. While initially thrilled with her newfound abilities, Iris soon realizes how difficult it is to balance her new superhero duties with her job as a journalist and her personal life with Barry. Meanwhile, Ralph discovers that he has the power to shape-shift, leading to some hilarious and problematic situations. As Team Flash tries to protect Iris and stop Melting Pot's plan, they're also faced with a more personal crisis when Cecile's pregnancy gives her telepathic powers that threaten to reveal everyone's deepest secrets. With humor, heart, and high-speed action, "Run, Iris, Run" is a fun and exciting episode that adds a new dimension to the show's mythology and characters.