Co-creator Eric Kripke said that one reason he wanted the Hindenburg in the pilot was financial. He said, "They're going to give us more money to make a pilot, so let's go with the most expensive idea we can think of, that they would never let us do in a series. So, we were like, 'Alright, let's crash a freaking blimp!'"
The date in time that the team will travel to during each episode is displayed in the numbers on the Flip Clock in the opening credits where the word TIMELESS eventually appears.
NBC cancelled the series on May 10, 2017, then reversed the decision on May 13, 2017. One of the co-creators said that 10 episodes are planned for summer 2018.
Although the premise of the show is that they are going back to prevent history from changing, most episodes end with changes to authentic history that haven't really occurred. The producers have stated they have a plan for dealing with these.
A 2016 lawsuit claims that the series was plagiarized from El ministerio del tiempo (2015), a Spanish series about (in the lawsuit's words) "the adventures of a three-person government team (consisting of one woman and two men) travelling through time to thwart undesired changes to past events". At one point, the creators were courting Sony to make a US version. NBC and Sony argued that this premise is sufficiently generic that no individual can claim ownership, and that otherwise the shows are entirely different. The case was settled out of court in May 2017.