CBSLeonard Nimoy certainly did live long and prosper.
The Star Trek star passed away at the age of 83, but he's left us with a wonderful legacy of TV work. In addition to his role as Spock in the original Star Trek series and the subsequent movies, Nimoy had beloved recent roles on The Simpsons, The Big Bang Theory and Fringe.
On The Simpsons, Nimoy played himself. He popped up in the fan-favorite "Marge vs. the Monorail" episode from 1993 and helped save Krusty the Klown and was beamed away in the end. A few seasons later in 1997 he returned to narrate The Simpsons and The X-Files crossover episode, "The Springfield Files."
The official Simpsons Twitter shared a photo Nimoy's first episode with this message: "Goodbye, Leonard. You will be greatly missed. #LLAP"
On Fringe, Nimoy returned to the world of science fiction and played William Bell in 12 episodes from 2009 to 2012. His character was Walter's (John Noble) former lab partner and the founder of Massive Dynamic. Nimoy retired from acting after the second season, but provided the voice of the character in subsequent seasons and reappeared in season four.
In 2012, he voiced Mr. Spock on The Big Bang Theory's "The Transporter Malfunction." Nimoy provided the voice to a Spock toy that haunted Sheldon Cooper (Jim Parsons), but never actually appeared. Nimoy was referenced several times on the show. One Christmas, Penny (Kaley Cuoco) got Sheldon an autograph (and DNA) from the famed actor.
"'Of all the souls I have encountered in my travels, his was the most... human.' Live long and prosper," Big Bang Theory executive producer Bill Prady tweeted.
Nimoy's other TV roles after Star Trek include Becker, Invasion America, Mission Impossible, The Outer Limits, Duckman: Private Dick/Family Man and several TV movies. He also appeared on Star Trek: The Next Generation as Spock in 1991. The original Star Trek series aired from 1966 to 1969.