'48 Hours' 2 back-to-back episodes Saturday Sept. 17, 2016

48 HOURS on CBS. The second episode airs Saturday at 10/9 p.m. It is called, "What Happened in Apt. 1601?." This is a repeat episode and all I can say is, people never remember when murder is involved. The girlfriend in that apartment recalls nothing so she can be free to walk the streets.

CBS says, "Three friends walk into a studio apartment, and only two come out alive. At least one of them is a killer, but which one? "48 Hours" correspondent Richard Schlesinger investigates."