The Galaxy-class Starship Enterprise is guided by a leader who is both an intellectual and an explorer, Captain Jean-Luc Picard (Patrick Stewart). The second in command -- often referred to as "Number One" -- is First Officer William Riker (Jonathan Frakes), with their science officer, the android, Lieutenant Commander Data (Brent Spiner). Counselor Deanna Troi (Marina Sirtis) serves as the ship's psychologist, and seeing that all is well with the warp engines is Chief Engineer Geordi La Forge (LeVar Burton). Overseeing sickbay is Chief Medical Officer Beverly Crusher (Gates McFadden), who is joined for 3 1/2 seasons by her precocious son Wesley (Wil Wheaton) before his departure for Starfleet Academy. An interesting twist, Chief of Security Lieutenant Worf (Michael Dorn) serves as the only Klingon in Starfleet -- a symbol of detente between the former enemies. Down below, in Ten Forward lounge, Whoopi Goldberg appears in a recurring role as the empathetic hostess Guinan. Frequently taunting the crew is the seemingly omnipotent being known simply as "Q" (John de Lancie).
	Deep Space Nine is commanded by Captain Benjamin Sisko (Avery Brooks), alongside Science Officer Jadzia Dax (Terry Farrell), a "joined" Trill (the host Jadzia and the symbiotic invertebrate Dax); Medical Officer Dr. Julian Bashir (Alexander Siddig); the shape-shifting Founders expatriate Security Officer Odo (Rene Auberjonois); Chief Operations Officer Miles O'Brien -- formerly of the U.S.S. Enterprise NCC-1701-D -- (Colm Meaney); former Bajoran resistance fighter and now First Officer, Kira Nerys (Nana Visitor), and the Ferengi bartender Quark (Armin Shimerman). Also along for the ride is the widowed Captain's son, aspiring writer Jake Sisko (Cirroc Lofton), and a host of recurring characters from the many cultures who cross paths at DS9. In the fourth season the crew was joined by a STAR TREK: THE NEXT GENERATION veteran, the Klingon Lieutenant Commander Worf (Michael Dorn), as Strategic Operations Officer. Shortly after Worf's sixth-season marriage to Jadzia Dax, the Jadzia host was killed and the Dax symbiont survived to join with to a new host for the final season.
	The main crew members of the U.S.S. Voyager are: Captain Kathryn Janeway (Kate Mulgrew), Vulcan Starfleet Tactical/Security Officer Tuvok (Tim Russ), a Holographic Doctor (Robert Picardo), and the former rebel leader as Janeway's First Officer Chakotay (Robert Beltran). A native of this region of space takes on the roles of guide/cook/handyman, Neelix (Ethan Philips), originally with his Ocampa companion Kes (Jennifer Lien) alongside. During the series' fourth season, as Kes shed her physical body while outgrowing her telepathic powers, a de-assimilated Borg drone dubbed Seven of Nine (Jeri Ryan) became a reluctant member of the crew. A half Klingon ex-rebel serves as Chief Engineer, B'Elanna Torres (Roxann Biggs-Dawson), and Ops / Communications Officer Harry Kim (Garrett Wang) is a recent Academy graduate. The ship's pilot is field-commissioned Lieutenant Tom Paris (Robert Duncan McNeill).