Patrick Stewart. Patrick Stewart was 52 in Star Trek: The Next Generation - Descent as 'Captain Jean-Luc Picard'.
Jonathan Frakes. Jonathan Frakes was 40 in Star Trek: The Next Generation - Descent as 'William Riker'.
LeVar Burton. LeVar Burton was 36 in Star Trek: The Next Generation - Descent as 'Geordi La Forge'.
Michael Dorn. Michael Dorn was 40 in Star Trek: The Next Generation - Descent as 'Worf'.
Gates McFadden. Gates McFadden was 44 in Star Trek: The Next Generation - Descent as 'Beverly Crusher'.
Marina Sirtis. Marina Sirtis was 38 in Star Trek: The Next Generation - Descent as 'Deanna Troi'.
Brent Spiner. Brent Spiner was 44 in Star Trek: The Next Generation - Descent as 'Data / Lore'.
John Neville. John Neville was 68 in Star Trek: The Next Generation - Descent as 'Isaac Newton'.
Jim Norton. Jim Norton was 55 in Star Trek: The Next Generation - Descent as 'Albert Einstein'.
Natalija Nogulich. Natalija Nogulich was 42 in Star Trek: The Next Generation - Descent as 'Adm. Alynna Nechayev'.
Brian Cousins. Brian Cousins was 34 in Star Trek: The Next Generation - Descent as 'Crosis'.
Stephen Hawking. Stephen Hawking was 51 in Star Trek: The Next Generation - Descent as 'Self'.
Richard Gilbert-Hill. Richard Gilbert-Hill was >> in Star Trek: The Next Generation - Descent as 'Bosus'.
Stephen James Carver. Stephen James Carver was >> in Star Trek: The Next Generation - Descent as 'Tayar'.
Jonathan Del Arco. Jonathan Del Arco was 27 in Star Trek: The Next Generation - Descent as 'Hugh'.
Alex Datcher. Alex Datcher was 31 in Star Trek: The Next Generation - Descent as 'Ens. Taitt'.
James Horan. James Horan was 38 in Star Trek: The Next Generation - Descent as 'Lt. Barnaby'.
Benito Martinez. Benito Martinez was 21 in Star Trek: The Next Generation - Descent as 'Salazar'.
Michael Reilly Burke. Michael Reilly Burke was 28 in Star Trek: The Next Generation - Descent as 'Goval'.Alexander Singer. Alexander Singer was 65 in Star Trek: The Next Generation - Descent as 'Director'
René Echevarria. René Echevarria was >> in Star Trek: The Next Generation - Descent as 'Writer'Jeri Taylor. Jeri Taylor was 54 in Star Trek: The Next Generation - Descent as 'Story, Executive Producer'
Rick Berman. Rick Berman was 47 in Star Trek: The Next Generation - Descent as 'Executive Producer'
Michael Piller. Michael Piller was 45 in Star Trek: The Next Generation - Descent as 'Executive Producer'Jay Chattaway. Jay Chattaway was >> in Star Trek: The Next Generation - Descent as 'Music'
Jonathan West. Jonathan West was >> in Star Trek: The Next Generation - Descent as 'Cinematography'
Ronald D. Moore. Ronald D. Moore was 28 in Star Trek: The Next Generation - Descent as 'Teleplay'
Gene Roddenberry. Gene Roddenberry would have been no older than 70 in Star Trek: The Next Generation - Descent as 'Creator'