Friday Night Movie: I’m not saying Alfred Hitchcock was a serial killer or anything

In 1927, when he would have been 27 or 28 and pretty much unknown, Hitchcock directed a British silent film, The Lodger: A Story Of The London Fog
There are several Lodger films from around this period. They’re based on this novel, which would be forgotten today except that it inspired a minor vogue of movies. None of them are top notch, but some are quite watchable.
Here’s my favorite, with Jack Palance.  
The basic idea is that in late Victorian London a genteel couple take in a lodger. He’s young, respectable, attractive, solitary, maybe just a tad odd. Is he Jack the Ripper? (It varies; I don’t know if he turns out to be or not, I haven’t read the novel.) 
In the Palance version the murders taking place in the background are specifically referred to as the “Jack the Ripper” killings, although the names, circumstances and descriptions of the girls bear no relation to Jack’s actual victims.
In the Hitchcock version the Ripper is not specifically referenced, but, get this: the killer has a signature. (And this was well before serial killer profiler TV shows.) Guess what that signature was.
All the victims have a certain hair colour.
Enjoy it. I did.