Collector (Shades of Gray)
From Tardis Wiki, the free Doctor Who reference
The Collector wanted many priceless works of art. He played on people's emotions to get what he wanted. He once made a deal with Dorian Gray. He played on the mind of Dorian's lover Spencer Price and took over his body. He also scared Caitlin when she was in a mental institute. He once got Jennifer to steal Dorian's portrait. (AUDIO: Shades of Gray)