Heroes & Aliens: Cast and Creators PaleyFest

Cast and creators of The CW’s “Arrow,” “The Flash,” “Supergirl,” and “Legends of Tomorrow” gather for a celebration of their shows at PaleyFest LA on March 18, 2017. Topics include: the complicated process for moving “Supergirl” from CBS to The CW; why the 100th episode of “Arrow” proved so emotional for all involved in its production; and cast members’ ideas for “crazy” series crossovers.