Complex sentence: Larry Storch reprises his role as the Joker in two crossover episodes of the 1972 series "The New Scooby-Doo Movies", in which he teams up with the Penguin and runs afoul of Batman, Robin and the Mystery Inc. gang.
Split into simpler sentences: Larry Storch reprises his role for two crossover episodes of the 1972 series "The New Scooby-Doo Movies". In both episodes, he teams up with Penguin and runs afoul of Batman, Robin and the Mystery Inc. gang.