Caught this on the Hitchcock for the Holidays collection on Criterion Channel. 

I really didn’t know much about this movie - apart from the Julian Fellowes commentary of Gosford Park which told me that Jeremy Northam’s character Ivor Novello was a real actor had just remade one of his silent films, The Lodger - so decided to dive in. 

Maybe a little too much misdirection/early MacGuffin use because it bogs down somewhat in the middle before “surprise!” he’s actually trying to catch the killer. But fantastic atmosphere