Join or Sign In
Sign in to customize your TV listings
By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.
A physicist celebrates a breakthrough in reversing the flow of time -- until a haunting figure pays him a visit.
There are no TV Airings of Undo in the next 14 days.
Add Undo to your Watchlist to find out when it's coming back.
Check if it is available to stream online via "Where to Watch".