Catch up TV on Dallas. Watch the latest and all other episodes of Dallas now online, broadcast on GEM. Catch up on your favorite GEM TV show: Dallas. Replay tv on its best! Dallas is back for a new round of backstabbing, feuding and passion! Based upon one of the most popular television dramas of all time, the series centres on the Ewing clan, an enormously wealthy Texas family whose sibling rivalries, romantic betrayals, corruption and even acts of murder are legendary.