It's a 'Wonder Years' and 'The O.C.' showdown as Jason Hervey attempts to sink Mischa Barton in the dunk tank competition. While Mischa doubts her character Marissa would have participated, she takes on the challenge and gets dunked... complete with a belly flop! From the season 1 episode, 'Primetime Soaps vs. ABC Stars.' Watch 'Battle of the Network Stars' THURSDAYS 9|8c on ABC.