The week-long national syndication window opens for the 70th episode of Star Trek: The Next Generation. Mark Lenard (Planet Of The Apes) guest stars as Spock’s father Sarek, the first original series character to appear since the cameo appearance of Dr. McCoy in the series pilot. 
Stardate 43917.4: Famed Vulcan Ambassador Sarek, father of Spock, beams aboard the Enterprise to be transported to his final diplomatic duty. But he is suffering the initial symptoms of a mind-deteriorating Vulcan disease and his Vulcan telepathic skills inadvertantly project violent, irrational impulses in the crew’s minds. Picard decides to risk a mind-meld to stabilize Sarek for the negotiations, but the captain risks his own sanity.
television story and teleplay by Peter S. Beagle
from an unpublished story by Marc Cushman & Jake Jacobs
directed by Les Landau
music by Dennis McCarthyCast: Patrick Stewart (Captain Jean-Luc Picard), Jonathan Frakes (Commander William Riker), LeVar Burton (Lt. Geordi La Forge), Michael Dorn (Lt. Worf), Gates McFadden (Dr. Beverly Crusher), Marina Sirtis (Counselor Deanna Troi), Brent Spiner (Lt. Commander Data), Wil Wheaton (Wesley Crusher), Mark Lenard (Ambassador Sarek), Joanna Miles (Perrin), William Denis (Kiv Mendrossen), Rocco Sisto (Sakkath), Colm Meaney (Chief O’Brien), John H. Francis (Science Crewman)
LogBook entry by Earl Green