In this episode, we take a step back and examine the chilling evidence left behind by the Zodiac Killer. From his choice of victims and weaponry to the taunting letters and unsolved ciphers, we explore the clues that continue to fascinate and terrify the public. What kind of killer was the Zodiac? Was he motivated by thrill, control, or a deeper, twisted satisfaction? With insights from criminologists and profilers, we piece together what we know about the man behind the cryptic messages and chilling murders, and we ask: was the Zodiac truly an enigma beyond capture, or did he leave behind the clues that could still unmask him?

In Episode 20, we dive into two of the most compelling suspects in the Zodiac case: Lawrence Kane and Gary Francis Poste. Both men have eerie connections to the Zodiac's timeline, unsettling pasts, and behavior that seemed to match the killer's profile. Harvey Hines spent years investigating Kane, linking him to multiple victims, including the disappearance of Donna Lass. Decades later, the Case Breakers turned their attention to Poste, a seemingly mild-mannered man whose dark past hid possible ties to Zodiac crimes. Join us as we unravel the evidence, sift through the theories, and try to determine if either of these men was truly the Zodiac Killer.

In Episode 22, we explore the making of David Fincher's "Zodiac," the 2007 movie that brought the infamous Zodiac case to life on the big screen. Delving into the dedication of screenwriter James Vanderbilt and the meticulous direction of David Fincher, this episode highlights the challenges of transforming a true crime saga into a compelling film while staying true to the victims and those who pursued the killer. Join us as we examine how the filmmakers recreated pivotal moments, interviewed key witnesses, and grappled with presenting a prime suspect, all in an effort to tell one of America's most chilling unsolved mysteries.