Another new Grandad, this time he takes his many different grandchildren to meet famous people from history and lets them ask questions.
Ryan won't let his sister Scarlett join in his play sword fight as "girls can't fight with swords". Grandad arrives and tells them about Boudica, they then travel to AD61 and meet her.
Lucy does not want to go to the doctor's for a vaccination, Grandad arrives and takes her and her brother Duncan to meet Dr Jenner.
Morgan and Harry are drawing pictures of bridges and boats. Grandad tells them about Isambard Kingdom Brunel, then they travel to meet him.
Scarlett and Ryan are having a battle between soldiers and robots. Grandad arrives and tells them about Mary Seacole, who helped injured soldiers during the Crimean War.
They travel back in time to meet her and help to collect fresh medical supplies.