Martha Hyer appeared in "Wyoming Renegades" as Nancy Warren, the daughter of a local rancher who helps Captain John Delmont (played by Phil Carey) and his group of Confederate soldiers fight against the corrupt businessman, Frank Madden. 

Brady Sutton (Phil Carey), a former member of the "Hole in the Wall" gang, wants to go straight. He returns to his home town, Broken Bow, and sweetheart Nancy Warren (Martha Hyer), to set up a blacksmith business. At the bank he sees one of the gang casing the joint.  Cassidy and the gang raid the town, but Nancy has mustered the womenfolk and the robbery fails. Most of the gang are killed and Cassidy is captured. Brady and Nancy are re-united.

Hyer's performance in the film was well-received, and she was noted for her naturalistic acting style and ability to convey emotion without being overly dramatic.