Sunday will be a special day for fans of Leonard Nimoy, the iconic actor and director who died Friday at the age of 83.
Syfy will air a mini-marathon honoring Nimoy, featuring not only his appearances on "Star Trek: The Next Generation" and 1991's "Star Trek VI: The Undiscovered Country," but also his popular "Twilight Zone" episode "Quality of Mercy."
In fact, it will be "Twilight Zone" that kicks off the marathon at 9 a.m. ET, which originally aired Dec. 29, 1961. That episode — written by Rod Serling and Sam Rolfe — also featured Dean Stockwell, who would later gain fame for "Quantum Leap" and "Battlestar Galactica." It was a war scene that would be remade for the Twilight Zone movie in the 1980s that resulted in the death of Vic Morrow.
The first part of the TNG episode "Unification" will begin soon after at 9:30 a.m., followed by the second part at 10:30 a.m. The episodes featured the 1991 appearance by Nimoy on the show to help promote "Undiscovered Country." It also featured Mark Lenard's final Star Trek appearance.
Syfy concludes the marathon with "Undiscovered Country" at 11:30 a.m., the last Trek film to include Nimoy in a starring role alongside William Shatner.
Another cable channel, Epix, will do its own tribute of Nimoy with two specials, beginning with "A Conversation With Leonard Nimoy." Epix will air that special sharing Nimoy's personal thoughts and anecdotes Feb. 27 at 11 p.m. ET, Feb. 28 at 5:40 and 10 p.m., and March 1 at 8 p.m.
Epix also will air "Star Trek: Into Darkness" Feb. 28 at 10:15 p.m. ET, and March 1 at 8:15 p.m. ET.
This story was updated 2/27/15 at 6:30 p.m. to include Epix programming information.