Catch up TV on River Monsters. Watch the latest and all other episodes of River Monsters now online, broadcasted on ABC1. Catch up on your favorite ABC1 TV show: River Monsters. Replay tv on its best! Extreme angler, Jeremy Wade is on the hunt for freshwater fish with a taste for human flesh. Piranhas, alligators, man-eating fish are just some of the river monsters Jeremy encounters in this new series.