Actor and fight master Peter Woodward guides viewers back to a time when knowing how to swing an ax meant the difference in life and death. Our experts practice with the Viking single- and double-headed types and learn that in the right hands these difficult and exhausting weapons had no equal. We also examine the berserker, an ax-wielding Viking warrior who worked himself into a state of concentrated fury. Finally, we look at the double-headed Saxon ax that was nearly the size of a man. TV PG