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But Spader has been acting since the '80s and has appeared in some of the most notable movies of the '80s and '90s. Known for portraying eccentric characters who don't quite fit the mold (just like Raymond Reddington), Spader is sought after for his ability to captivate audiences and fully immerse himself in a role. But which were his best? Here are his 10 best film performances, according to RottenTomatoes.