Trouble on the Orion Express
The Daxzians had a reputation for being light-fingered.
The Eleventh Doctor encountered one disguised as a staff member in the buffet carriage of the Orion Express, ideally placed to relieve passengers of their possessions. On this occasion The Doctor’s sonic screwdriver was the possession in question, recognised as valuable by his enemies, who would pay handsomely. The Daxzian was exposed and the sonic returned. (Trouble on the Orion Express)