Date of Birth - March 18, 1949
Place of Birth - Savannah, Georgia, USA
Height - 5' 11½" (1.82 m)

Most Famous Role(s) Other Than Star Trek:
- Zorro TV series as Alcalde Ignacio de Soto

Trivia About the Actor:
- Full name is John Garman Hertzler.

Six Feet Under (2004-2005) (TV)
- Starring as the Gallery Owner in 3 episodes
- This is a drama series that takes a dark, comical look at members of a dysfunctional Pasadena family that runs an independent funeral home. With the prodigal elder son (Peter Krause) returning home for the holidays to shattering news, the family must learn to deal with a death of their own, while figuring out how to go ahead with the business of the living.

Everybody Loves Raymond (2002) (TV)
- Starring as Everett Munce in "Who Am I?"
- Ray Barone (Ray Romano) seemingly has it all. A wonderful wife (Patricia Heaton), a beautiful family, a great job, a nice house on Long Island. There's only one problem. His obnoxious parents, who live across the street, and his jealous brother are always getting in the way.
- In this episode, Ray fears something is wrong with him after he comes back from a night out with his friends and tells Debra that he didn't enjoy it. She thinks Ray is finally growing up. But then Ray says he wants to join his Father's lodge.

Touched by an Angel (2000) (TV)
- Starring as Simon in "The Face on the Bar Room Floor"
- Monica (Roma Downey), Tess (Della Reese), and Andrew (John Dye) are angels sent from heaven to inspire people who are at a crossroads in their lives. Monica, reports to Tess, her tough, wise, and always loving supervisorand Andrew, is the Angel of Death who also helps out with cases.

Roswell (2000) (TV)
- Starring as Mr. Lafeber in "Ask Not"
- Living in Roswell are four who are not there by choice, and are there to follow a destiny given to them by the members of their dying race. Max Evans, Isabel Evans, Michael Guerin and Tess Harding are human/alien hybrids, sent here as replacements for the royalty of an alien race. The teens hid their gifts until Max healed a classmate after she was fatally shot in the stomach. It is a distinctly science-fiction show built on the relationships between humans and aliens.
- In this episode, Brody Davis, the mysterious new curator at the UFO Museum has the group on edge, and Michael and Isabel plotting his demise.

Sabrina, the Teenage Witch (2000) (TV)
- Starring as Plato in "Double Time"
- Sabrina (Melissa Joan Hart) is sent by her parents to live with her Aunt Hilda (Sherry Miller) and her Aunt Zelda (Charlene Fernetz), where finds out on her sixteenth birthday that she is actually a witch.
- In this episode, Sabrina casts a spell to speed herself up. Zelda takes a position as a prof at the college.

Charmed (2000) (TV)
- Starring as a Council Member in "Be Careful What You Witch For"
- The three Halliwell sisters (Holly Marie Combs, Alyssa Milano and Rose McGowan) discover that they are descendents of a line of female witches. Each has a special ability (stopping time, moving objects, seeing the future), and they can also combine their abilities into the "Power of Three" to fight demons, warlocks, and other evils.
- In this episode, the Council of evil beings assigns a Genie to trick the Halliwell sisters with three wishes and make them vulnerable to the Killer of witches Dragon Warlock.