The upcoming Arrow/The Flash spinoff, DC’s Legends of Tomorrow, has named its showrunner.

Phil Klemmer, who has worked on other Greg Berlanti productions like The Tomorrow People, Golden Boy and Political Animals, will serve as showrunner for Legends of Tomorrow. He will executive produce alongside Berlanti, Andrew Kreisberg, Marc Guggenheim and Sarah Schechter.

Klemmer also served as a producer on Forever, Chuck and Undercovers. His writing credits include all the aforementioned series as well as Veronica Mars.

Related: Legends of Tomorrow: Caity Lotz’s character, first trailer revealed

The logline for the series reads as follows:

“When heroes alone are not enough… the world needs legends. Having seen the future, one he will desperately try to prevent from happening, time-traveling rogue Rip Hunter is tasked with assembling a disparate group of both heroes and villains to confront an unstoppable threat — one in which not only is the planet at stake, but all of time itself. Can this ragtag team defeat an immortal threat unlike anything they have ever known?”

We know from the trailer that the “unstoppable threat” is the immortal dictator Vandal Savage.

Related: The Flash’s Victor Garber teases his role in season 2, Legends of Tomorrow

The cast will include Arrow‘s Brandon Routh (Ray Palmer/Atom) and Caity Lotz (Sara Lance/Canary) and The Flash‘s Wentworth Miller (Leonard Snart/Captain Cold), Dominic Purcell (Mick Rory/Heat Wave), and Victor Garber (Dr. Martin Stein/half of Firestorm). Joining these established characters will be three heroes who have never appeared on television played by Ciara Renée (Kendra Saunders/Hawkgirl), Arthur Darvill (Rip Hunter), and Franz Drameh (Jay Jackson/Mystery Hero).

Legends will air at mid-season of the 2015-16 television season.

Will you watch ‘Legends of Tomorrow’?