We haven't had a Double (Be)Header around here in a while, in fact, let's call this one a "Face-Off!" shall we? We pit DC's House of Mystery against their own House of Secrets in a no holds barred match of tales sharing a similar theme. Which one comes out on top? Our first story is from the August 1972 issue of HoM #205, while the opposing yarn is from the April 1973 issue of HoS #107.