The card Endless Interrogation's cost is zero and says, " Response: After you succeed at a story, discard a card at random from each opponent's hand. Then, you may pay 1 to return Endless Interrogation to your hand instead of discarding it."
While playing with my friends the other day we argued whether or not this card could be played multiple times on the same turn at the end of the story phase after succeeding at a story. As long as you have enough domains shouldn't you be allowed to play this card multiple times? Maybe you need to have succeeded at multiple story's to play it multiple times?