Supergirl 3x02 "Triggers" Season 3 Episode 2 Extended Promo - Psi (guest star Yael Grobglas), a thief with psychic powers, attacks National City. Able to immobilize people by tapping into their worst fears, Psi proves a formidable opponent for Supergirl. Meanwhile, James (Mehcad Brooks) and Lena (Katie McGrath) are at an impasse, and Samantha starts her new job at L-Corp. David McWhirter directed the episode written by Gabriel Llanas & Anna Musky-Goldwyn (#302).

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