During a relic hunt, Ratchet and Wheeljack get a one-of-a-kind opportunity when Soundwave's flying minion, Laserbeak, is disabled.

Mick Jagger hosts and is the music guest in the Season 37 finale.

This Mystery Box is a cracker - literally. Then later, the winner of this challenge gets to pick the key ingredient for the following Invention Test.

While on a field trip, Spider-Man and his superhero friends encounter the mighty Thor, who is transformed into a frog by his mischievous half-brother Loki. Now, the heroes must venture to the magical world of Asgard in order to save the nine realms from Loki's wrath.

While searching for the fire demon Surtur, Thor is attacked by a powerful creature known as Beta Ray Bill, and the unthinkable happens when Bill lifts Thor's hammer as the two battle. Thor must ally himself with this strange warrior to save Asgard before Surtur and his demon army burn it to the ground.

Holly and Reggie return with the results of this week's public vote. Bo and Vince learn that they have topped the public vote and are guaranteed a place in the semi finals of the competition. Jessie and Danny then have to decide which two of their respective acts will be going home this week. Paloma Faith performs live on stage. Danny decides that Aleks and David are going home whilst Jessie decides that Toni and Cassius will be leaving her team.

The investigation into the murder of 29-year-old Niall is made difficult by those closest to him, who seem intent on obscuring the facts, and it is not until the body of a drug dealer washes up on a beach that the dreadful truth begins to emerge. While coping with revelations of her own, Vera sifts through evidence of the grief, love and addiction that characterised Niall's life as she tries to find out why someone wanted him dead.