Leonard Nimoy/Star Trek/After

After the cancellation of Star Trek, Nimoy moved on to another Desilu/Paramount series, , playing the regular character of Paris for two seasons (1969 – 1971). He joined the series as a replacement for the departing Martin Landau, who, ironically, was up for the role of Spock before Nimoy got the part. Lee Meriwether had a recurring role during Nimoy's first season on Mission: Impossible. Brooke Bundy and Alfred Ryder had roles in "The Controllers", the first episode shot with Nimoy. Many other past and future Star Trek actors appeared with Nimoy during his two seasons on Mission: Impossible, including Arlene Martel and David Opatoshu in the episode "Terror." 
After Mission: Impossible, Nimoy starred with Lloyd Haynes, Malachi Throne, William Windom, and John Winston in the ABC Movie of the Week Assault on the Wayne (for Paramount Television) and co-starred with , , and TOS guest actor Jeff Corey in the western film Catlow, both released in 1971. He then starred in three 1973 TV movies: an unsold pilot titled Baffled! (as a race car driver who has visions of people dying), Columbo: A Stitch in Crime (as a murderous doctor), and The Alpha Caper (co-starring James B. Sikking, Paul Sorensen, Victor Tayback, and Kenneth Tobey, and executive produced by Harve Bennett). 
In 1973, Nimoy was hired by Gene Roddenberry to star in the title role of his science fiction pilot (and possibly series) The Questor Tapes, however he got replaced by Robert Foxworth. Nimoy didn't receive a word from Roddenberry about him being dumped, and only found it out when he accidentally met Foxworth on the studio lot.Gene Roddenberry in the 1970s - After Star Trek
Nimoy made his directorial debut with a 1973 episode of Night Gallery entitled "Death on a Barge," which featured one-time TOS guest actor Lou Antonio and future TNG guest actress Brooke Bundy. Nimoy cast Lesley Ann Warren, one of his Mission: Impossible castmates, in the lead role in this episode. He also appeared as an actor on Night Gallery, in a segment entitled "She'll Be Company For You," alongside Kathryn Hays, and directed by TOS cinematographer Gerald Perry Finnerman. Finnerman also photographed the aforementioned episode directed by Nimoy. Also in 1973, Nimoy made his Broadway debut in a revival of the play Full Circle, working with future guest star Peter Weller. 
In 1976, Nimoy began hosting a television series called In Search Of…, a syndicated documentary program dealing with topics such as Bigfoot and other monsters, Atlantis, Stonehenge, Jack the Ripper, and other unsolved mysteries. Although the series ended in 1982, the A&E Network and later A&E's The History Channel aired In Search Of… throughout the 1990s and the early 2000s.