Don't think I've played any sci-fi yet, so here's an early Dimension X, "the premier series of adult science fiction tales," as radio historian (and Denveroon) John Dunning called it. This one's titled "Knock." Good stuff, done live (listen to the music and sound effects). No date, but probably the spring of 1950.
And a Vic and Sade. Almost didn't pick this show because it's nowhere near Christmas, but it's funny, so who cares. "Vic's Christmas Card List" (again, no date except the year, but it must have been some time in December, 1939).