The five anglers head to Costa Rica to explore the Pacific Ocean and come face to face with some of the most incredible fish in the world. Fishing close to shore off the tip of the Osa Peninsula, the anglers seek out the fast and furious roosterfish and learn to lasso handlines like the locals in the rough surf, before heading offshore to seek the fastest fish in the world - the sailfish. The anglers have just one day to catch and tag this incredible fish, but things don't go quite according to plan. Matt Hayes adjudicates alongside local fishing expert Todd Staley, who has led the way in fish conservation in Costa Rica. Between them they must decide which angler to send home, whilst the rest make it through to the semi-final. Presented by Ben Fogle.