“DC’s Legends of Tomorrow” is back for Season 4 on The CW and Caity Lotz tells Access about how Constantine joining the team — and the baggage he brings – will cause the heroes some trouble. Plus, Caity reveals how things are going for her character, Sara Lance, and Ava this season, hinting at a movie-inspired scene coming up for the pair in the weeks ahead. “DC’s Legends of Tomorrow” airs Mondays at 9/8c on The CW.