4-th episode of 2-th season "Cities of the Underworld"

What "Cities of the Underworld" 4-th episode about

Dublin, Ireland is much more than a city full of pubs and pints. Burial tombs, defense tunnels, and mysterious burial crypts line the underground below the rolling hills.

Episode number: 4

Episode name: "Viking Underground"

Episode release date: 26 february 2008 at 02:00

Status: aired