The Night of the Death Maker - S3.E24

An attempt to assassinate President Grant is foiled at the last minute by West and Gordon. However,there seems to be more going on than a simple assassination,as the weapon used in the attempt was one stolen in recent raids on government and territorial armories. The President refuses to cancel a trip to Dever,leaving Jim and Artemus only 36 hours to uncover who is responsible and stop them before it's too late.