The Forsaken details the incursion of an electronic being into DS9, named 'Pup' by O'Brien, who is eventually placed in a recursive program by O'Brien to keep it from running amok with the station.

Do we ever see or hear of this intelligent program again? Do any episodes, expanded universe novels, or even fan fiction stories tell of the fate of O'Brien's unwanted pet 'dog'?

  • It's never mentioned again on-screen. In hindsight, one might imagine that it could have some connection to Vic Fontaine - perhaps it evolved into something that "broke out" of its doghouse and took over Fontaine's original personality subroutines to make him sentient.
    – Anthony X
    Jul 2, 2019 at 0:07

1 Answer 1


Although it's never again mentioned in the TV series or films, the electronic virus known as the Pup does make a briefly appearance in the Trek Novel "Star Trek: Deep Space Nine: Valhalla" when O'Brien releases it in order to distract an electronic entity known as Enak who's taken over control of the station...

Instructions were being countermanded. Signals were being blocked. New software subroutines were interfering with Enak's orders.

Enak was losing control. The Pup was out of its doghouse and in Enak's virtual lap, and it had noticed that Enak was running the station. It wanted attention, wanted to play, so it was doing the cybernetic equivalent of jumping up and licking Enak's face.

Distracted, countered by one of its own distant relatives, Enak was unable to dominate the computer systems; it was kept busy just dealing with the Pup's friendly overtures.

At the end of the book, O'Brien returns it (apparently willingly) to its virtual 'doghouse'.

  • 1
    That...is adorable. But are there any more references to Pup in any other works?
    – Zibbobz
    May 7, 2014 at 18:50
  • @Zibbobz - Not really. A couple of tangential references in various reference books like "Jadzia's Science Log" but nothing more than that
    – Valorum
    May 7, 2014 at 18:57
  • Darn...I was hoping Pup might've had a bit more closure than that, been released or matured into a full 'dog' at some point, that sort of thing. Well...I'll leave this open a little longer in case anyone digs up something really interesting.
    – Zibbobz
    May 7, 2014 at 19:05
  • @Zibbobz - I've had another hunt and there doesn't seem to be anything else. Time to close this, perhaps.
    – Valorum
    Aug 14, 2014 at 10:45
  • Agreed...that's too bad too. I rather liked Pup.
    – Zibbobz
    Aug 14, 2014 at 13:18

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