Bang Goes the Theory
Singing Road, Dad Dancing, DNA Family Tree
TV-PG
S4 • E7 Apr 25, 2011 30mThis episode of the series that reveals your world with a bang has a royal wedding theme. Jem builds a singing road as a present for the royal couple. Dr Yan explains the science of dad dancing. And Liz uses DNA to track her family tree right back to the earliest humans.
