Sarah's last chance to bring her nemesis back to sanity slips away as Art intervenes to get answers of his own. Meanwhile, the Orphans must decide whether to make peace with their creators, as Sarah is forced into a deadly confrontation with their enemy.

Chris Hardwick's guests are Seth Rogen and writing partner Evan Goldberg. Plus, the hilarious Zach Galifianakis, new companion Jenna Coleman and comedian Natasha Leggero!

Anna and Gino's romance continues to blossom as they sneak off to spend time together, even though it's clear that something about their secret trysts is playing on Gino's mind. At Ash Park, the relationship between Olivia and James is at breaking point as Olivia struggles with the identity of James' lover.

The knockout rounds come to an end and the line-up for the live shows is revealed as mentors Jessie J, Tom Jones, Will.i.am and Danny O'Donoghue finally settle on the three acts they are each taking through to the quarter-finals. Presented by Holly Willoughby and Reggie Yates. The quarter-finals are on Friday at 7pm.