Preview trailer for the Supergirl midseason premiere "Legion of Super-Heroes"
Preview clip and "Inside" video promoting the Supergirl episode "Reign"
Screen captures from the preview trailer for the Supergirl midseason finale "Reign"
Official preview images for the Supergirl season finale titled "Reign"
Supergirl's Melissa Benoist talks about this year's DC TV crossover "Crisis on Earth-X."
Supergirl cast member Chyler Leigh previews the four-show DC TV crossover "Crisis on Earth-X" airing on The CW.
Actor David Harewood has shared a peek inside the Legion ship on Supergirl.
Preview images for the Supergirl chapter of the DC TV crossover "Crisis on Earth-X, Part 1"