Trepper was a Polish employee at an ATMOS factory. Martha Jones, while working for UNIT, examined Trepper and found out he, and the other ATMOS workers were hypnotised by the Sontarans. (TV: The Sontaran Stratagem)
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.