The final battle against the Witness begins as the fate of time and mankind hangs in the balance; all the pieces finally come together to mark the end of the beginning.

Lives are in danger as the team protects Shelby when she reunites with someone from her past, resulting in deadly consequences.

BattleBots elite Icewave and Skorpios square off in an epic throwdown, and the rest of the bots battle to secure their spots in the Sweet 16. Fight card: Chomp vs. Huge, Brutus vs. War Hawk, Captain Shrederator vs. Petunia, Yeti vs. Bombshell. Main event: Skorpios vs. Icewave.

When rival riding school Holloway steals Bright Fields' recently won County Cup, Zoe and Pin must steal it back before Mia's press interview begins.

When all hope is lost, Cole must complete his cycle so that his younger self will one day arrive at the end with the answer.

Matt Bessette vs. Steven Peterson, Gerald Meerschaert vs. Oskar Piechota.

Montana De La Rosa vs. Rachael Ostovich, Luis Pena vs. Richie Smullen, John Gunther vs. Allan Zuniga, Tyler Diamond vs. Bryce Mitchell.

Brad Tavares vs. Israel Adesanya, Joe Giannetti vs. Mike Trizano - "The Ultimate Fighter 27" lightweight tournament final, Jay Cucciniello vs. Brad Katona - "The Ultimate Fighter 27" featherweight tournament final, Martin Bravo vs. Alex Caceres ,Barb Honchak vs. Roxanne Modafferi, Alessio Di Chirico vs. Julian Marquez.

In Iraqi Kurdistan, Vice's Ben Anderson met those involved in the fight from the frontline to the Kurd's former guerrilla president to ask why the group recently voted for independence and what hopes they have for achieving a state of their own. Nuclear physicist Taylor Wilson joined the Air Force Space Command to see how a growing military and commercial space presence threatens the ubiquitous satellites, which are essential to humanity's digital way of life.

Webby learns how Scrooge and Mrs. Beakley first met while she helps Scrooge rescue her granny from the clutches of rival spy Black Heron.

Although he is obviously ill, Hiro refuses to listen to his team-mates and Baymax and only watch from afar as they fight the mercenary team Mad Jacks.