Timeless is an American science fiction drama television series that premiered on NBC on October 3, 2016. It stars Abigail Spencer, Matt Lanter, and Malcolm Barrett as a team that attempts to stop a mysterious organization from changing the course of history through time travel. The series was created by Shawn Ryan and Eric Kripke, and also stars Sakina Jaffrey, Paterson Joseph, Claudia Doumit, and Goran Višnjić. The executive producers include John Davis and John Fox of The Blacklist.

Although NBC canceled the series after one season, the series was renewed three days later following negotiations with Sony Pictures Television. The ten-episode second season premiered on March 11, 2018, and ran until NBC canceled the series again in June 2018. One month later, NBC ordered a two-part finale to conclude the series, which aired on December 20, 2018.

When Eastern European–based ex-National Security Agency asset turned terrorist Garcia Flynn and his group of terrorists steal an experimental time machine, Lucy Preston, a history professor, Wyatt Logan, a United States Army Delta Force Master Sergeant and Rufus Carlin, an engineer and programmer, are tasked with capturing Flynn. They soon learn that Flynn plans to rewrite history and that each of them has a connection to his plan as well as the mysterious organization known as Rittenhouse that funded the machine's development.

Ryan, Kripke, Sony Pictures Entertainment and NBCUniversal were sued by Onza Entertainment for breach of contract and copyright infringement, claiming that the concept for Timeless was based on the Spanish series El ministerio del tiempo (The Ministry of Time), which follows the adventures of a three-person team made up of two men and a woman who travel to the past with a view to preserving past events.^[36]

In April 2015, Javier Olivares, one of the creators of El Ministerio del Tiempo, met with representatives of Gersh in the MIPTV audiovisual fair of Cannes. There, they discussed the possibility of developing an American version of the show. Gersh would later ask for a DVD copy of the first episode of the Spanish show, with English subtitles.^[37] Onza Partners, the Spanish production company, gave that DVD to the Gersh Agency in the hopes of working with them. Roy Ashton, from the Gersh Agency, wrote to Onza letting them know that they liked El Ministerio del Tiempo and wanted to work with them. Ashton also mentioned Eric Kripke and Ben Edlund as possible show runners.^[38]

In August 2015, Deadline^[39] reported that NBC had bought a project called Time, created by Kripke and Shawn Ryan. At the same time, all negotiations regarding the American version of El Ministerio del Tiempo were dropped. That project went on to become Timeless, with its pilot episode airing in January 2016.^[40]

The defendants responded to the suit in a November 23, 2016 filing, contending that shows about time travel are an established television genre, and that similarities between the two shows are generic, and largely based on the notion that the main characters will travel in time to effect some kind of change.^[41] A request to dismiss Onza's lawsuit by Sony was denied on February 15, 2017,^[42] but the two parties ultimately came to an agreement and jointly moved to dismiss.^[43]

Season 1 aired on NBC in the U.S. and on Global in Canada on Monday nights at 10 p.m. Eastern and Pacific (9 p.m. Central). Season 2 aired on NBC and Global on Sunday nights at 10 pm. EST/PST. (9 p.m. CST). Episodes can also be streamed online through NBC and Global's respective websites, as well as on Netflix in some countries.^[44] Episodes can also be streamed on Hulu in the United States. Starting from December 14, 2016, it aired in the UK on E4 every Wednesday at 9:00 pm. UK time.^[45] The series also aired in Japan on AXN.^[46]