Season 2 Episode 21 – Mark of the Monkey, Part 1

The Dark Signers show up to taunt the Signers following Yusei's duel with Roman. Demak introduces himself and reveals he is in possession of Ancient Fairy Dragon and challenges Luna to come get it. Roman announces that their duels will take place at the four safety switches of Old Momentum. Whilst chasing after them, Jack discovers that one of the Dark Signers is Carly, who tells him to find her if he wants to know what happened. Back at Martha's house, the children are blaming themselves for her sacrifice, but Yusei promises the children he will be able to bring everyone back after defeating the Dark Signers, even though he is uncertain if that will actually happen.