HOW Season 2 Episode 4 Episode 4 ( Air Date 2022-04-28 ) Genre Kids category. Overview "Join the team in the HOW Hub as Vick shows how cream can catch you out, Frankie discovers how salt can destroy a tank, Sam explains just how you can eat a mouldy sandwich, and Head of HOW Fred Dinenage asks the team how it's possible to sculpt sand.".