An investigation into the rumors that the U.S. government is working covertly with space aliens to create alien-human hybrids.

Lidia's friends - both old and new - help her attempt to force Carlos to call Sofía back from the front lines. Pablo looks for ways to avoid enlisting.

Multiple advisers counsel Félix to go into hiding as the Americans close in on the men involved in Kiki's murder. Amado helps Acosta resolve a feud.

Aliyah discovers a connection between The Archive and her late mother while an impromptu performance tests the patience of those in power.

With his workforce unionizing, Ian faces a looming departure, the game's future, and the meaning of two words: Blood Ocean.

Twenty years after Mary Fisher's death, Internal Affairs Sgt. Lynch and Det. Chen fly to Texas to interview Trey Carano, a former friend of Eric's, who shares his account of Eric's whereabouts in the days and hours leading up to the murder.

As pieces begin to click into place for the Locke siblings, Ellie opens up about her connection to Dodge, and Kinsey comes clean with her friends.

Rob stews over her recent encounter with Mac and builds a secret playlist. Simon and Cherise take Rob to a concert, where she meets the lead singer, Liam - who might just be the distraction she needs.

Lord Byron and the Shelleys prepare for a night telling ghost stories, but their villa proves to have ghostly presences all its own.

DGM get to work on a new mission, bringing down Ronny Kent. Olivia's relationship with Donte is put at risk because of it.

Freddie and Chris tackle the toughest off-road race on the planet: The brutal Baja 1000.

Trixie helps a blind mother, Marion, care for her new baby, but trouble starts when Marion's sister calls Social Services to intervene.

As campaigning for the 1970 general election gets underway in Oxford, racial tensions escalate in the city and a clash between two young rival gangs results in tragedy. Initial investigations lead Endeavour and Thursday to the door of a familiar face, where they discover the influence of the British Movement, a right wing organisation hoping to win an Oxford seat.

Elsewhere in the city, tragedy strikes a second time, this time an Indian restaurant, where a customer's mysterious disappearance and a shocking murder put even the strongest family loyalties to the test.

Mark fears his life is at risk, and his growing paranoia begins to haunt his dreams. Can he uncover the secret of the witches at the Pale Horse before it's too late?