• Screenwriter Phil Klemmer and actor Dominic Purcell attend DC's 'Legends Of Tomorrow' Special Video Presentation and Q&A during Comic-Con International 2016 at San Diego Convention Center in San Diego, California.

Screenwriter Phil Klemmer and actor Dominic Purcell attend DC's 'Legends Of Tomorrow' Special Video Presentation and Q&A during Comic-Con International 2016 at San Diego Convention Center in San Diego, California. (Photo : Getty Images/Matt Winkelmeyer)

"Legends of Tomorrow" Season 2 episode 15 is titled "Fellowship of the Spear." The episode will show how the Legends enlist the help of a soldier named John Ronald Reuel Tolkien (Jack Turner) to retrieve the last remaining fragments of the Spear of Destiny from the Legion of Doom.

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The Legends devise a plan to accomplish this mission when they find themselves in France at the height of World War I. They are faced with the knowledge that they must destroy the mystical object.

Apparently, the Spear is leading the Legends into the heart of the war. The team has to resist the temptation of the Spear.

Another thing to expect from "Fellowship of the Spear" is the return of a former teammate. Joining Turner in the episode are Victor Garber as Dr. Martin Stein, Brandon Routh as Ray palmer, Arthur Darvill as Rip Hunter, Caity Lotz as Sara Lance/White Canary, Franz Drameh as Jefferson Jackson/Firestorm, Matt Letscher as Eobard Thawne, Maisie Richardson-Sellers as Amaya Jiwe/Vixen, Nick Zano as Nate Heywood, Neal McDonough as Damien Dahrk and Chris Cope as a junior officer.

"Prison Break" stars Dominic Purcell and Wentworth Miller will play their respective characters Mick Rory and Leonard Snart/Captain Cold in "Legends of Tomorrow" Season 2 episode 15 titled "Fellowship of the Spear." The episode will air on March 21, Tuesday, at 9:01 p.m. on The CW.

Here is a "Fellowship of the Spear" trailer: