The Chuckle Brothers - aka Paul and Barry Chuckle - are filming the 20th series of their CBBC show, ChuckleVision.
In this episode, which will be shown early next year, the Brothers visit their Granddads at the Bide A Wee home for retired gentlefolk.
They discover that the matron is forcing the residents to work; making and packing in-flight meals for Fly-by-Night Airlines.
It does not take long before the Chuckle Granddads are out the door, supposedly visiting their old friend 'Giant Jock', leaving Paul and Barry to take their places.
The residents - along with 'fake' Granddads Paul and Barry - hold a demonstration to get rid of Matron. At this point in the story she doesn't know the 'real' Granddads have left.
Paul and Barry were sent to make-up to transform them into the 'fake Granddads'...
...Make-up artist Gill Hall gave them a red nose, wig and flat cap for the scenes.
Director Jack Jameson said: "Paul and Barry know exactly what they are doing... I just have to give them the space for them to do what they do best, which is perform."
The Chuckle's real-life brother Jimmy Patton has appeared in 44 episodes, usually telling them off with his catchphrase 'no slacking'. In this episode he plays Nurse Slacking.
And there is no slacking for Paul and Barry, who use the breaks between scenes to swot up on their lines.
The Chuckle Brothers are celebrating 20 years of ChuckleVision. The new series will be shown on CBBC in the New Year.