Home Advent Calendar 2017 Day 17: Tomorrow's World Christmas Special, 1975

No Christmas Quiz in those days, instead something actively improving under the sub-title Now You See It.... Now You Don't! Raymond Baxter as our ineffable MC leads a group of children towards the show's resident presenters and experts, including Michael Rodd, Judith Hann and William Woolard, as they have fun with science through the use of mirrors, drawings, oversized dice, swings, toys, electronic signals, bells, some kind of electronic ears and a bit where Rodd invents that Jamiroquai video.