‘Supergirl’ Cast Talks Second Supergirl Introduced in Season 4

“Extra” Special Correspondent Danielle Robay sat down with the cast of “Supergirl” at Comic-Con 2018 to get the scoop on Season 4. Watch as Katie McGrath, Melissa Benoist, Jesse Rath, David Harewood, Mehcad Brooks, Chyler Leigh and Nicole Maines dish on what’s in store, including a Russian Supergirl. “Supergirl” returns to The CW in the fall.