“Arrow’s” Oliver Queen (Stephen Amell) is Dr. Nate Heywood’s (Nick Zano) last resort in saving the Legends.

In a promo video featuring new “Legends of Tomorrow,” Nate meets up with Oliver to ask for help in rescuing his time-travelling friends who are stuck in different periods of time.

“I’ve exhausted all my normal avenues and you’re the only person left who won’t think I’m crazy,” Nate tells Oliver in the clip. “For the past six months, I’ve been noticing subtle changes to history, almost imperceptible. I think your friends are responsible.”

When the two apparently found one of the Legends, the Green Arrow suggests that Dr. Heywood should help the rescued member to locate and save the rest of the team.

“If your team is stuck in history, who better to help them than a historian,” Oliver tells the unidentified Legend who seemed to have rescued first.

When Nate declined, Oliver tells him, “Who are you kidding? You’ve been waiting your whole life for a chance like this.”

Although Nate will be introduced to the show as a regular character, he is actually the grandchild of Justice Society of America’s Commander Steel (Matthew MacCaull).

In the comics, Nate followed his grandfather’s footsteps as a superhero and became Citizen Steel. As revealed in the show’s logline for Season 2, the CW’s incarnation of the character will follow the same story arc.

In an interview with KSiteTV last August, executive producer Phil Klemmer explained why they decided to introduce Nate as an ordinary character instead of bringing him into the group as an established superhero.

“We want to meet a guy that nobody knows; in fact, who doesn’t even know that he is destined to become a superhero, because that gives you the first act of the Spider-Man movie,” the Klemmer said. “Tobey Maguire was like, ‘Oh my God! I can do this! But I’m not great at doing it! And oh, I’m using it for selfish purposes, but should I use it for good?’ You want a neophyte; a guy who’s been dropped into this world from the regular world, to point out the absurdity and the fun, so that was why we wanted to have Nate becomes a superhero within Season 2.”

“Legends of Tomorrow” Season 2 premieres Thursday, Oct. 13 at 8 p.m. ET on The CW.