This one-way time-traveling adventure continues to dive further into history, as everyone's favorite foils, James Rison and Simon Magus, join forces with another pair of Agents of The Sing in Tombstone Arizona, to ensure that the shootout at the OK Corral is Future Proof! Meanwhile, the enigmatic Umbrella Man comes face-to-face with his younger self when he revisits the JFK assassination and proves that the future is a thing of the past.