Hacker T Dog welcomes a host of stars to the ultimate Christmas party in this live extravaganza from CBBC HQ. There is pantomime fun in Hack and the Beanstalk, a look back at 2016 on CBBC and loads of chances to get involved at home. Also, look out for appearances from many of your favourite CBBC presenters as they battle it out to prove they know the most about Christmas. With Hacker in charge anything could happen - and probably will!