Fireman Sam: Alien Alert and Bob the Builder: Mega Machines - The Movie are both set to air in 2017.
Mattel Creations, a new theatrical, television and digital content creation division from Mattel, has detailed new TV specials for Fireman Sam and Bob the Builder at MIPTV.
Fireman Sam: Alien Alert will debut in 2017 and sees David Tennant voice the villain, alien-hunter Buck Douglas.
The special sees Pontypandy hit by a raft of UFO sightings, with Fireman Sam determined to get to the bottom of the mysterious events.
“Alien Alert is an action-packed Fireman Sam adventure for pre-schoolers, and we’re delighted to have the talented David Tennant on board as the voice of Buck," said Christopher Keenan, senior vice president, global content and executive producer at Mattel Creations.
"The special stays true to core Fireman Sam values - bravery, loyalty, heroism, community and teamwork - but takes us to new levels of excitement with a sci-fi slant that includes new characters, rescue vehicles, locations, and plot twists. Producing Alien Alert has been an incredible joy and we're confident that our young audience will be captivated by our most dramatic Fireman Sam story yet.”
Elsewhere, Bob the Builder: Mega Machines - The Movie will also land on television and DVD next year.
Keenan added: “The film tells the story of Bob's biggest build yet and introduces three new "mega" characters who help reinforce the show's themes of teamwork, perseverance and optimism - with plenty of comedy, construction and conflict resolution along the way.
"We're confident that Bob the Builder: Mega Machines will delight young audiences around the world and pave the way for further adventures with Bob and the team.”
Fireman Sam: Alien Alert and Bob the Builder: Mega Machines - The Movie are both being distributed worldwide by DHX Media.