John Diehl: John Diehl. Actor: The Client. John Henry Diehl has appeared more than 150 times in films and TV including Armageddon Time (2022), Five Days at Memorial (2022), Nixon, Stripes, and TV series Dark Winds (2022), Snowfall (2017), Castle Rock (2018), The Shield, and Miami Vice. Described by the Los Angeles Times as a "versatile and immediately recognizable" character actor, Diehl has has "...avoided the typecasting that is an accepted part...