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Sierra is a short-lived 1974 television crime drama series focusing on the efforts of National Park Service rangers to enforce federal law and to effect wilderness rescues. The program aired on NBC and was packaged by Jack Webb's Mark VII Limited for Universal Television. John Denver wrote the show's theme song. Robert A. Cinader, executive producer of Mark VII's Emergency!, handled this program also; Bruce Johnson produced.
Michael Warren
Ranger P.J. Lewis
Jack Hogan
Chief Ranger Jack Moore
James G. Richardson
Ranger Tim Cassidy
Ernest Thompson
Ranger Matt Harper
Susan Foster
Ranger Julie Beck
1991
2020
2022
2021
2012
1988
1998
1994
2013
2021
2025
2018
2008
2025
2009
2021
2009
2023
1995
2018