I don't think Cary Grant was ever more frantic in his film career than in Arsenic and Old Lace. He's one bundle of perpetual motion as Mortimer Brewster theater critic and member of a family where insanity doesn't just run, it gallops. He's got two daffy old spinster aunts who poison lonely old men to cure their loneliness, a brother who thinks he's Teddy Roosevelt, and another brother who is a homicidal maniac. Quite a family tree. Grant's performance is so good, you can see the fevered workings of his mind in his facial expressions as he frantically tries to get his whole family committed before the aunt's deeds are discovered.

This is a must-see Halloween movie, filled with Gallows humor, leaf-strewn graveyards, pumpkins and death. Cary Grant delivers a performance unlike any other he has ever done - manic, panicked, hysterical and almost as insane as his screen family. John Alexander is flawless as Teddy; bugles, pith helmet and all. Jean Adair and Josephine Hull are so sweet and cute and so absolutely morbid you'll forgive them anything. Raymond Massey as Boris Karloff lookalike Jonathan is simultaneously menacing and amusing, and Peter Lorre as his drunken German sidekick Dr. Einstein is a riot, bugging his eyes and flinching through the entire film in a most endearing way.

This is one of the best screwball comedies ever. Cary Grant's over the top performance just makes it more-so!

I can watch this movie over and over and never get tired of it. It definitely goes up as one of the funniest movies I've ever seen. The look on Cary Grant's face every time he finds out something new is worth a viewing alone. A classic in every way, shape, and form. 10/10