Gregory Ambrose Calderone

As a barroom fight sends Shaun (Freddie Highmore) to seek treatment at St. Bonaventure’s, Park and Morgan disagree over an elderly woman’s post-operative symptoms. Melendez (Nicholas Gonzalez) and Lim (Christina Chang) make their romance public, while Glassman continues to pursue a relationship with a good friend.

As the castle prepares for the Winter's Ease Feast, King Antoine (guest star Ben Aldridge) of Navarre reveals to Francis and Mary England's plan for revenge against France. Bash learns that an "undead" man has been seen in the village and his efforts to track the man down lead him to a mysterious woman in white. Meanwhile, Catherine finds out the cause of her hallucinations. Sean Teale, Celina Sinden, Craig Parker, Rose Williams, Caitlin Stasey, Jonathan Keltz and Anna Popplewell also star.

When MIT grad student Liam Cole (Charlie Rowe) discovers an asteroid is set to collide with Earth in 186 days, he joins forces with tech billionaire Darius Tanz (Santiago Cabrera) and the U.S. government to try and stop it - and together they stumble onto the greatest conspiracy never told.

Darius and Liam work to invent a theoretically impossible piece of technology to divert the asteroid, and Grace risks everything to help Darius. Also, Liam heads home to Boston to track down critical research, but finds something shocking instead.

Grace narrowly escapes a deadly assassin and Darius and Liam forge unlikely alliances.