Star Trek: The Next Generation: Il segreto di Spock (Parte I e II)

Patrick Stewart

Capt. Jean-Luc Picard (archive footage)

Jonathan Frakes

Cmdr. William Riker (archive footage)

LeVar Burton

Lt. Cmdr. Geordi La Forge (archive footage)

Michael Dorn

Lt. Worf (archive footage)

Gates McFadden

Dr. Beverly Crusher (archive footage)

Marina Sirtis

Counselor Deanna Troi (archive footage)

Brent Spiner

Lt. Cmdr. Data (archive footage)

Leonard Nimoy

Spock (archive footage)

Joanna Miles

Perrin (archive footage)

Mark Lenard

Sarek (archive footage)

Majel Barrett

Enterprise Computer (voice) (archive footage)