This film’s direction from Joseph Von Sternberg is brilliant, visionary and haunting. The star turn by Marlene Dietrich in "The Blue Angel" made her a screen icon. But perhaps Emil Jannings is the real treasure. His tough professor turned pathetic loser is absolutely devastating by the end of the film, with an unforgettable breakdown sequence and final scene. His performance is uncanny and is as much responsible for the longevity of this timeless film as is Dietrich's famous performance as Lola Lola. My question to you ... is the professor an introvert? [from amazon.com review]