'Timeless', co-created by Eric Kripke, is one of two new shows for the 2016 fall season that is created by a previous show-runner for Supernatural. The other is Frequency (2016), created by Jeremy Carver. Both shows revolve around Time Travel.
As with most productions about time travel this one gets the time implications wrong. As soon as the time machine is in the past, whatever had happened has and people in the present won't know what it was. So if they go back with the lifeboat they would not know how it originally would have taken place.
Also there's no reason why the time machines would come back days later than they left. The time spent in the past doesn't influence what time they come back to.
Dive back into your favorites as we round up all the best series returning to TV and streaming in 2021.