Leonard Nimoy never appeared in person on “The Big Bang Theory” but his name and that of “Star Trek’s” Mr. Spock are often referenced on the CBS comedy about a group of misfit physicists and engineers.

As such it is no surprise that the show took the opportunity to pay tribute to the actor, who died Feb. 27 at the age of 83, with Thursday’s episode.

Nimoy did lend his voice to the 2012 “Big Bang” episode “The Transporter Malfunction.” Another episode involved a storyline where Kaley Cuoco’s Penny gave Jim Parsons’ Sheldon the gift of a napkin used by Nimoy in the restaurant where she worked as a waitress.

In the end-credits space usually reserved for a message from exec producer Chuck Lorre on his Chuck Lorre Prods. vanity card, a black-and-white picture of Nimoy ran with the caption: “The impact you had on our show and on our lives is everlasting.”

Simple, direct, unquestionable. Mr. Spock would have found it entirely logical.

leonard nimoy thank you