Before they fired phasers and explored the vast vacuum of space, INSP stars toted six-shooters and blazed trails in the American Old West.

As the iconic show Star Trek celebrates its 50th Anniversary, we celebrate the stars who started their journey to the final frontier on some of our most popular shows.

Leonard Nimoy (Spock) appeared in Bonanza, The Virginian and Daniel Boone

William Shatner (Captain James T. Kirk) appeared in The Virginian and The Big Valley

DeForest Kelley (Dr. McCoy) appeared in Bonanza and The Virginian

James Doohan (Montgomery “Scotty” Scott) can also be seen in Bonanza and The Virginian

Majel Barret (Nurse Christine Chapel) appeared in Bonanza

Ricardo Montalban (Khan) guest starred in Bonanza, Daniel Boone, The High Chaparral and The Virginian

And then there’s the other frontier—the legal frontier!

Scott Bakula (Captain Jonathan Archer) guest starred on Matlock!