The Secret of the Red Room
S4:E2
1957
IMDb
The technical notes say that this television drama was in black and white. But I remember its being broadcast in color, one of the very few broadcasts in color at that time. I remember because my father was trying out, on loan, a new color television set, and we saw this broadcast as a test of the color quality of the broadcast and of the set. The quality was good for this broadcast, as I recall, but not for all broadcasts.