Who played Spock's love interest Leila on the "Star Trek" (NBC, 1966-69) episode called "This Side of Paradise"?

Jill Ireland played Spock’s love interest Leila on the “Star Trek” (NBC, 1966-69) episode called “This Side of Paradise”.

What "Star Trek" episode features Spock with a beard? "Mirror, Mirror," where Leonard Nimoy portrays an evil Spock in a barbaric parallel universe, features Spock with a beard.
On "Star Trek," what were the names of Spock's parents? Spock's parents in Star Trek were Sarek, a Vulcan ambassador, and Amanda, a human being.
What were the first names of Scott, Chekov, and McCoy on "Star Trek" (NBC, 1966-69)? Their first names of Scott, Chekov, and McCoy on "Star Trek" are as follows: Montgomery Scott Pavel Andreivich Chekov Leonard McCoy
On what TV series was William Shatner a regular before "Star Trek" (NBC, 1966-69)? William Shatner a regular on the TV series "For the People" (CBS, 1965) before appearing on "Star Trek" (NBC, 1966-69). Shatner played Assistant District Attorney David Koster.
On what TV series did William Shatner and Leonard Nimoy work together before "Star Trek" (NBC, 1966-69)? William Shatner and Leonard Nimoy both appeared in a 1964 episode of the TV series "The Man from U.N.C.L.E." (NBC, 1964-68) called "The Project Strigas Affair."
What science-fiction TV series did Leonard Nimoy appear in before "Star Trek" (NBC, 1966-69)? Leonard Nimoy appeared in the science-fiction TV series Zombies of the Stratosphere (1952) before "Star Trek" (NBC, 1966-69). Nimoy played Narab, a Martian.