Saturday Mash-Up Live! S02E07 - With Mabel, Tiana, Benedict Cumberbatch and Joe Tracini

In this episode, Hacker catches up with star of The Grinch, Benedict Cumberbatch. Mabel performs her new single, vlogger Tiana drops in and Dengineers host Joe Tracini is live all morning. There's cartoon action in two brand new episodes of Dragons: Race to the Edge, plus games galore including Push Off, Musical Toilets and How Many Things in the Thing. It's totally live - so anything can happen! Yasmin Evans, Jonny Nelson and Hacker T Dog host.