Timeless season 2 trailer: Save the date for March 11 NBC has released a plethora of TV spots and a full trailer for Timeless Season 2 which you can check out in the player below! The series returns to NBC on Sunday, March 11 at 10 PM. In its first season, Timeless averaged a 2.1 rating in adults 18-49 and 8.0 million viewers overall in “live plus seven day” ratings from Nielsen Media Research.