The Soporific agent was a form of gas used by the Soul Pirates to stun their victims, usually children, in order to capture them. (A Big Hand for the Doctor)
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.