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 of Borg, 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.
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