Don Keith Opper (right) in 'Critters.' Courtesy of the Oldenburg Film Festival Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment The Oldenburg International Film Festival will honor actor and writer Don Keith Opper, best known for his role as Charlie McFadden in the Critters franchise, with a tribute program at this year's event.