Cassie's mischievous cousin Abigail is back in Middleton, forcing Cassie to attempt tough love as Sam and Grace are swept up in Abigail's spell.

When the new Spanish Alpha tries to blackmail Jeremy into murdering the Russian Alpha, the Pack has things under control until a surprise visit from Savannah upends their plans. Nick and Paige try to secretly meet Nick's mother.

Flint and Miranda come to grips with their past. Bonny makes clear her intentions to Rackham. Vane collects a huge prize. Eleanor issues a declaration of war.

An accident exposes old wounds, complicating the already difficult situation between Danny and his family.

Hulk allows himself to be turned back into Bruce Banner but then struggles with the decision when Ronan launches an alien attack.

Casey Jones thinks he can take on the criminal underworld on his own, but soon discovers that he is in over his head.

It is Valentine's Day and Pompidou would like a date. A chance meeting with a lady from a dating agency means that his wish could come true, but Pompidou's idea of romance isn't the same as everybody elses.

The pressure continues to mount on Ralph as Jaya reveals the real reason for her visit to Simla. A mountaineer saves Alice, Madeleine and Ronnie from a perilous situation.

Elizabeth has a baby and Ross attempts to put on a brave face at the christening, where he is furious to hear people talking about his relationship with Demelza. Wheal Leisure mine opens and the miners immediately hit ironstone, requiring extra money for gunpowder.

Nancy has not told Gus about her engagement to Harry and doesn't wear her engagement ring when he is around. Harry is still feeling pressured to boost shareholder profits. After a surprise delivery from the Russian Embassy shows up at the Selfridge house, Princess Marie feels moved and ecstatic to see her precious family jewels secreted away inside.

Lou spearheads preparations for the big day while Amy throws herself into gentling a rescue horse in order to avoid all the craziness.