The Vampire Plants (Dr. Who Annual story)

The Vampire Plants is a sadly uncredited story from the Doctor Who Annual 1970. In it, the second Doctor, Jamie McCrimmon and Zoe Heriot visit the Doctor's old mate Dr. Vane at "the Botanical Gardens on Venus" and discover that he's accidentally imported a killer plant, so the Doctor sets fire to it with his lighter.

I didn't even know he smoked...