U.S. Marshal Annie Frost must share the details of her past with the team in order to pursue a case that has put her father's life in danger. On a hunt to locate her father after two decades, Annie experiences flashbacks to her childhood, ultimately discovering the secret behind a lifelong betrayal.

Steve's dad visits in the wake of an oil spill and gets Emmy to spearhead cleanup efforts, but Steve is suspicious of his father's true motives.

Justin Timberlake / Lady Gaga

Cooking in threes, the contestants are faced with a challenge that fuses the finest elements of both the Mystery Box and Invention Test by creating an outstanding dish using unknown ingredients.

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After woman is murdered in a hedgerow her son manages to survive the attack but he ends up falling beneath the ice on a nearby frozen pond as he attempts to escape. He is pulled from under the ice by Vera and against all the odds he survives. Vera discovers a kindred spirit in the boy as the investigation into his mother's murder begins and she ends up coming to realise the key to solving the case lies buried in his memory.