Get ready to squeal with excitement, it's your first EXCLUSIVE clip of the new series! And boy, do we have a treat in store for you.
Hit play and watch in delight as a certain James Corden discovers that even if you're over 5,000 miles away; Ant and Dec will still hunt you down. They will find you. And they will prank you. Looks like somebody is going to be very, very late....
See the entire prank in full (alongside even more celeb shenanigans) on Saturday at 7pm!
Vintage One Direction alert! They may be the biggest boyband on the entire planet, but not even the 1D crew were safe from the Undercover wiles of Ant and Dec back in 2013.
How will Zayn, Niall, Harry, Louis and Liam cope with our boy's hysterical wind up as Ant and Dec go undercover to give One Direction a chance encounter that they'll never forget!? Have a watch for a blast from the past!
Shhhh, exclusively tiptoe behind the scenes with us at the theatre where Stephen Mulhern's panto is in production. Ant and Dec are getting ready to give the presenter a massive Undercover surprise...
Break a leg, guys! Not literally, obviously.
THEY'RE BEHIND YOU! Oh yes they are. Stephen Mulhern was oblivious to Ant and Dec's involvement in this most ambitious Undercover set-up to date.
Watch above as they prank the Britain's Got More Talent host (and friend of the show) good and proper!
Get your funny bone out - it's going to be tickled. Ant and Dec unleash their most elaborate Undercover to date when they trick good friend and fellow presenter Stephen Mulhern on this week’s show!
The TV host was due to take centre stage in panto at The Hawth theatre in Crawley, but unbeknown to him, his naughty pals had a few surprises up their sleeves.
How does Stephen handle it? Watch this promo to see his first reaction, then make sure you tune into this week's show for the whole shebang!