DC’s Legends of Tomorrow, or simply Legends of Tomorrow, is an American action-adventure television series developed by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg and Phil Klemmer, who are also executive producers along with Sarah Schechter and Chris Fedak; Klemmer serves as showrunner. The series airs on The CW and premiered on January 21, 2016. The show is a spin-off from Arrow and The Flash, existing in the same fictional universe. On March 11, 2016, The CW renewed the series for a second season, scheduled to debut in October 2016. (Source Wikipedia)
The Flash is an American television series developed by Greg Berlanti, Andrew Kreisberg and Geoff Johns, airing on The CW. It is based on the DC Comics character Barry Allen / Flash, a costumed superhero crime-fighter with the power to move at superhuman speeds. It is a spin-off from Arrow. The series follows Allen, portrayed by Grant Gustin, a crime scene investigator who gains super-human speed, which he uses to fight criminals, including others who have also gained superhuman abilities.
Initially envisioned as a backdoor pilot, the positive reception Gustin received during two appearances as Barry on Arrow led to executives choosing to develop a full pilot to make use of a larger budget and help flesh out Barry’s world in more detail. Colleen Atwood, costume designer for Arrow, was brought in to design the Flash’s suit. The creative team wanted to make sure that the Flash would resemble his comic book counterpart, and not simply be a poor imitation. The series is primarily filmed in Vancouver, British Columbia, Canada.
The Flash premiered in North America on October 7, 2014, where the pilot became the second-most watched premiere in the history of The CW, after The Vampire Diaries in 2009. It has been well received by critics and audiences, and won the People’s Choice Award for “Favorite New TV Drama” in 2014. The second season premiered on October 6, 2015, with the series renewed for a third season in March 2016. (Via Wikipedia)