with first officer Riker was a carry-over from character ideas developed for Phase II. Troi also appeared in later episodes of Voyager, in the finale of Enterprise, and in the first season of Picard. Brent Spiner as Lieutenant Commander Data is an android who serves as second officer and operations officer. Data's "outsider's" perspective on humanity served a similar narrative purpose as Spock's in the original Star Trek. Spiner also played his "brother", Lore, and his creator, Noonien Soong. In Enterprise, Spiner played Noonien's ancestor, Arik, and contributed a brief voiceover (heard over the Enterprise-D's intercom) in the Enterprise finale. In Picard, Spiner reprised the roles of Data and Lore and portrayed the new roles of Altan Inigo Soong and Adam Soong. Wil Wheaton as Beverly Crusher's son Wesley (Seasons 1–4; guest: seasons 5 & 7). He becomes an acting ensign, and later receives a field commission to ensign, before attending Starfleet Academy. After being a regular for the first four seasons, Wheaton appeared occasionally as Wesley Crusher for the remainder of the series. Wheaton reprised the role in Star Trek: Nemesis and Picard. Recurring Majel Barrett as Lwaxana Troi, Federation ambassador and Deanna Troi's mother; also the voice of the ship's computer. Brian Bonsall as Alexander Rozhenko, Worf's son. Rosalind Chao as Keiko O'Brien, botanist until her transfer to Deep Space Nine in 2369. Denise Crosby as Sela, Romulan commander and Tasha Yar's daughter. John de Lancie as Q, a member of the Q-Continuum who frequently visits the USS Enterprise-D. Jonathan Del Arco as Hugh, a Borg drone who was disconnected from the collective by Geordi La Forge and Beverly Crusher. Michelle Forbes as Ro Laren, conn officer until her defection to the Maquis in 2370. Whoopi Goldberg as Guinan, bartender hostess on the USS Enterprise-D. Ashley Judd as Robin Lefler, engineering officer on the USS Enterprise-D. Andreas Katsulas as Tomalak, a Romulan commander who has several encounters with the USS Enterprise-D. Barbara March as Lursa, Klingon officer from the House of Duras and B'Etor's sister. Colm Meaney as Miles O'Brien, conn officer and later transporter chief until his transfer to Deep Space Nine in 2369. Eric Menyuk as The Traveler, a member of a species from Tau Alpha C who mentors Wesley Crusher Lycia Naff as Sonya Gomez, engineering officer on the USS Enterprise-D. Natalia Nogulich as Alynna Nechayev, flag officer in charge of Cardassian affairs. Robert O'Reilly