The series "Starfleet Academy" has brought back a star from "Deep Space Nine" in an episode that grapples with a long-standing "Star Trek" mystery. The episode appears to pay homage to "Deep Space Nine" and its characters, including the Sisko family. The return of the "Deep Space Nine" star, reportedly with the blessing of Avery Brooks, has been the subject of interviews and discussions about the episode's emotional impact and resolution of a "Deep Space Nine" mystery.