phone goes dead and nobody ever heard from her again. >> it was 3:42 in the morning police now had a theory. somehow heather had become a problem for sidney. so he lured heather to the landing and killed her. and there was more. investigators believed sidney and heather weren't alone. someone else was at the landing. coming up -- >> they believed that she was the ultimate brains behind this whole plan. >> who was that mystery person at the landing, and why would anyone want to harm heather? >> the fire, the jealousy explodes into utter rage. >> when "the landing" continues. e >> when "the landing" continues. - oh...oh. - what's going on? - oh, darn! - let me help. lift and push and push! there... it's up there. hey joshie... wrinkles send the wrong message. help prevent them with downy wrinkleguard. feel the difference with downy. ♪3, 4♪ ♪