Patrick Thomas O'Brien (born 1951) is an American actor. He is perhaps best known for playing the role of Mr. Dewey, the math teacher from Saved by the Bell.
باتريك توماس أوبراين (بالإنجليزية: Patrick Thomas O'Brien) هو ممثل أمريكي، ولد في 26 يناير 1951 في الولايات المتحدة. (ar)
Patrick Thomas O'Brien (born 1951) is an American actor. He is perhaps best known for playing the role of Mr. Dewey, the math teacher from Saved by the Bell. (en)