How many movies have Hal B. Wallis and Henry O'Neill collaborated on?

They have worked on 30 movies together! Their first movie together was Journal of a Crime (1934) while their highest rated movie together was The Amazing Dr. Clitterhouse (1938). They have not worked together since Santa Fe Trail (1940). They are most known for their drama films together.

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Cyrus Brody
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District Attorney (uncredited)
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District Attorney
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Parole Officer Masters
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Dr. Clinton Forrest, Sr.
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General Miguel Miramon
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Attorney Kellogg
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Colonel Dodge
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Sen. H. Baldwin
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General Theopholus Bogardus
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Commander Tisdale
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Dr. Thomas Haslett
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Dr. Endicott
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Jim Carstairs
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Charlie Caldwell
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Ward Bryant
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Mr. Appleby
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George Winston
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John W. Hendricks
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Attorney J.L. Chase (uncredited)
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Inspector Crane
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Banker Making Toast at Banquet