501206 Missing Night Watchman was 530621 Missing Night Watchman
At the end of the show it says it is CBS and a Sunday night. This would correspond with the June 21, 1953 date. In December 1950 the show was on NBC Wednesday nights. Also it states that Dick Powell's latest movie is Split Second. It came out in 1953.
51-11-02 Bowery Case was a mislabeled version of 520104 118 The Merry Go Round Case
53-09-06 Steak Knifes Case - George Lexington was 50-09-13 George Lexington Murder Case
53-09-20 Edna Wolfe Wants To Get Nancy Fowler was 50-08-09 Edna Wolfe Case - Nancy Fowler Murdered. It was sponsored by Rexall on the NBC network.