Yuri seals Battlehawk inside Hawknest after Battletank picks up a bomb while investigating a ZEAF.

Intro special guest: Nicola Bryant.

A submarine has unwittingly malfunctioned in enemy waters and Joe must remove it to prevent political carnage.

Intro special guests: Ronnie Le Drew and Sweep.

Fireballs fall to Earth from a mysterious gas cloud in space. The XL5 crew must contain the cloud before it reaches the atmosphere, but a technical fault forces Steve to complete the work by hand.

Intro special guests: Ronnie Le Drew and Beaver.

The Protectors find themselves in the middle of a war over some antiques.

Intro special guest: Prentis Hancock.

A new invention – the Crablogger (a nearly fully automated logging machine that converts wood into fuel) — threatens widespread devastation if it collides with an unfinished dam, after its drivers collapse due to food poisoning.

Intro special guest; Prentis Hancock.

Zelda attacks Earth on Christmas Eve, convinced that the Terrahawks' guard will be down. However, Ninestein anticipates such a move, and all-out war erupts. Perhaps the Christmas spirit can even reach someone like Zelda....

The townspeople plan a party for Tex's birthday.

Troy is assigned to recover a giant pearl from an ocean cave, but the task is not as simple as it seems.

Intro special guest: Sadie Miller

Masterspy sabotages a prototype atomic-powered diesel train on its journey from London to Brighton in England in a bid to assassinate a VIP passenger. Dr Beaker and the rest of the Supercar team have been invited to drive the train, but will they be able to stop the sabotaged engine before the vehicle crashes into a station at the end of the line?

King Dithers decides to brush his hair before his trip to Frutown, and he accidentally leaves his crown behind. After Daffy the Donkey pulls him into town, the king invites Torchy and Squish back to the palace for tea, but they soon discover the crown is not where he left it.