(written from a Production point of view)
Beside his on-screen acting appearances Jeffries is a renowned stage actor who earned several awards such as an Irene Ryan Award and two L.A. Drama Logue Awards.
On his acting resume are films such as Blue de Ville (1986, with William Frankfather), The Fabulous Baker Boys (1989, with Dakin Matthews, Albert Hall, Gregory Itzin, J.D. Hall, and Tina Lifford), The Arrival (1991, with Joseph Culp and Michael J. Pollard), Monolith (1993, with Musetta Vander and Boris Lee Krutonog), Executive Decision (1996, with Len Cariou, Andreas Katsulas, Paul Collins, Eugene Roche, Dey Young, Richard Riehle, Ken Jenkins, Brad Blaisdell, Warren Munson, and Blair Valk), The Deep End of the Ocean (1999, with Whoopi Goldberg, Brenda Strong, Timothy Davis-Reed, Van Epperson, Steve Blalock, and Mike Watson), and Without Warning (2002).
Jeffries has also guest starred in television series such as The Paper Chase (1986, with Robert Knepper and Steve Vinovich), Falcon Crest (1987, with Robert Foxworth, Dana Sparks, Brett Cullen, Rod Arrants, Michael Ensign, and Ellen Geer), L.A. Law (1988, with Corbin Bernsen, Rosalind Allen, Fran Bennett, Jim Jansen, and Christine Rose), The Golden Girls (1990), Matlock (1991, with David Froman and Andrew Prine), Dark Skies (1996, with Tim Kelleher, Conor O'Farrell, Natalija Nogulich, and Glenn Morshower), Seinfeld (1997, with Jason Alexander, Gene Dynarski, and Marco Rodriguez), The X-Files (2000, with Conor O'Farrell and Lawrence Pressman), 24 (2001, with Leslie Hope, Jude Ciccolella, and Zach Grenier), JAG (2002, with Steve Rankin and Leon Russom), and CSI: Crime Scene Investigation (2003, with Basil Wallace and Bari Hochwald).