as Mortimer Brewster: Grant famously disliked his own performance, calling it "over-acting," though critics often cite it as a masterclass in physical comedy.
as Dr. Einstein: Jonathan’s nervous, enabling companion. Arsenic and Old Lace (1944)
: Mortimer’s sociopathic, escaped-convict brother who has undergone botch plastic surgery (by the alcoholic Dr. Einstein ) that makes him look like horror icon Boris Karloff. Cast and Characters as Mortimer Brewster: Grant famously disliked his own