VIDEO : NBC Promises Epic TImeless Finale

NBC drama Timeless will wrap with a two-part series finale Thursday, December 20. NBC promises ?an epic, unforgettable thrill ride through the past, present and future, with a healthy dose of Christmas spirit.? The second season premiere of the time-travel show started March 11. Eric Kripke, Shawn Ryan and Arika Lisanne Mittman are the executive producers, with Kripke and Ryan creating the show and Mittman running it. John Showalter, John Davis, John Fox and Marney Hochman are also exec producers.