Along with Star Trek, Ewing guest-starred on six different series in 1969, including The Mod Squad (starring Tige Andrews and Clarence Williams III), Mission: Impossible (which, like Star Trek, was produced at Desilu; her episode also guest-starred Anthony Zerbe), and Gunsmoke (in an episode with Sid Haig). She also made her feature film debut that year, with a supporting role in the drama 80 Steps to Jonah, directed by Gerd Oswald.