Enter the Unicorn - S1.E23

Flint, Sarah, and Tony arrive in the Grand Canyon when pursuing the time-traveling Time Shifter Unita-Master. A fight between Flint and Petra Fina's group lands them in the Land of Time where Flint has his first encounter with the Old Timer and how the Time Shifters were scattered throughout time by the Dark Lord during an earlier attack on the Land of Time.