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.

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.

[29] Three days later, following negotiations with Sony Pictures Television, NBC renewed the series for a ten-episode second season,[30][31] which premiered on March 11, 2018.

[34][35] 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.

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.

[38] In August 2015, Deadline[39] reported that NBC had bought a project called Time, created by Kripke and Shawn Ryan.

The site's critical consensus states, "Timeless is a fun throwback action series with a kooky premise worth watching, even if it is delivered clumsily at times.