Our modern Halloween traditions have ancient roots -- people were going door to door and begging for treats on Halloween night as far back as the Middle Ages!
Much happened between then and the first commercial costumes coming on the market in the US in the 1930's.
This program, produced by the History Channel is an informative look at what Halloween started as, back with the Celts, and how it morphed into the intergenerational spectacle of Halloween that we observe today.