Wednesdays and Fridays this month, TCM is working its way through “50 Years of Hitchcock,” and I’ve already lost one night of sleep watching Alfred Hitchcock’s earliest works as showcased gloriously on TCM. (That scene in the 1929 silent film The Manxman, when the woman attempts suicide by jumping into a canal, and Hitchcock cuts from the bubbles on the water’s surface as she sinks to a close-up of the tip of her lover’s pen as he dips it in an inkwell? Come on!) Tonight, beginning at 8 p.m. ET with 1932’s Number Seventeen (pictured), we get another gluttonous banquet of early Hitchcock films, and we’re into the sound era for all of them. And the early “classic” Hitchcock films arrive quickly, starting at 9:30 p.m. ET with 1934’s The Man Who Knew Too Much (a film Hitch himself later remade). Watch, in particular, for 1935’s The 39 Steps (11 p.m. ET) and 1938’s The Lady Vanishes (12:45 a.m. ET) – but who am I kidding? Watch them all. I will be…