Catch up TV on Doomsday Bunkers. Watch the latest and all other episodes of Doomsday Bunkers now online, broadcasted on 7Two. Catch up on your favorite 7Two TV show: Doomsday Bunkers. Replay tv on its best! Doomsday Bunkers follows ‘preppers’ as they get themselves ready for real life disasters. This series pulls back the curtain on advanced and secretive underground bunkers -- impenetrable safety zones - that feature the ultimate in security, comfort, and cutting edge design and technology.