- Gary WrightSelf - Unabomber Survivor, 1987
- Terry TurchieSelf - Former Assistant SAC, FBI Unabomber Task Fo
- Randy ParsonsSelf - Special Agent, FBI
- Nina DelgadilloSelf - Senior Special Agent, ATF
- Ted KaczynskiSelf - Unabomber (archive footage)
- Phillip ResnickHimself - UH Case Medical Center 3 episodes, 2013
- Kathleen PuckettSelf - Behavioral Expert, FBI
- Quin DenvirSelf - Kaczynski's Public Defender