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Sonny Walker portrayed Stevie in the Doctor Who television story The Vanquishers. After Stenck sent a broadcast reminding the humans that any defiance is useless. Stevie was captured by the Sontarans and presented to the Grand Serpent. Stevie possessed key information as to the whereabouts of Kate Stewart. Stevie later revealed the location of Kate Stewart at Williamsons tunnel and was viciously executed by the Grand Serpent.