Cal Bolder
Cal Bolder , born Earl Craver, was an American actor and author. He played the role of Keel in the  second season episode . He filmed his scenes between Wednesday  and Monday  on location at Vasquez Rocks Natural Area Park and at Desilu Stage 10.

Bolder spent fourteen years with the Los Angeles Police Department before leaving to pursue a career in acting. That led to four movies and twenty or so television roles before he retired from acting at the end of the 1960s. His movie roles included the part of "Igor" in the memorably bad film, Jesse James Meets The Daughter of Frankenstein. He self-published the novel Last Reunion under his birth name, E.C. Craver.

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Performers
TOS performers