Like the title says, the quest [Imprisoned in the Citadel] appears to not be in the game. No matter how many times I did ShH, Drisella never had it, and the wowhead article doesn't list associated npcs, suggesting it was never fully implemented.

https://tbc.wowhead.com/quest=9524/imprisoned-in-the-citadel (Alliance)
https://tbc.wowhead.com/quest=9525/imprisoned-in-the-citadel (Horde)

Version 2.5.3 (Burning Crusade)

It appears to have been put in the game with P4.