The hit superhero series opens Season 7, which finds Barry Allen (Grant Gustin) trying to stop the cunning Eva McCulloch (Efrat Dor) and discover a way to find his missing wife, Iris West-Allen (Candice Patton). Season 6 recurring players Brandon McKnight and Kayla Compton, who play scientist Chester P. Runk and metahuman Allegra Garcia respectively, are promoted to series regulars, joining returning series veterans Danielle Panabaker, Carlos Valdes, Tom Cavanagh, Jesse L. Martin and Danielle Nicolet in their familiar roles.