In many ways, the 1980s are considered the deadliest decade in recent history. Who wants to travel back in time knowing the 10 years consisted of infamous cases like the serial-killing crime spree of ``Night Stalker'' Richard Ramirez, the Menendez brothers' murder of their parents, and Mark David Chapman's cold-blooded shooting of music legend John Lennon? Investigation Discovery explores the dark side of nostalgia to recount other notable murder investigations from the '80s, an era of ego where excess and greed dangerously collide.