The Sleeper Shall Awake/Where Walks the Sleeper/The Final Sleep - S1-E11
Continuity mistake: In part 3 an agent of the Red Skull tweaks a letter on a statue to activate the third and final "Sleeper." At a distance you see the statue depicts someone on horseback, one of the horse's hooves is above the ground. As the agent tweaks the letter, all four hooves are on the ground. (00:14:05)