Was there ever a scene with both Desmond and Ben in it? It seems like Ben should have known Desmond was in the hatch for 3 years, because when he and Juliet had been in the Pearl station and saw Jack on the screen, it didn't seem like a surprise to them. They knew the pearl station existed so they knew the Swan station existed. They could have been watching Kelvin, Desmond and now the losties all this time, along with Mikhail gathering info all the time too. Just part of the Dharma project.. But like I said I don't remember a scene with Ben and Des so I don't think they've met face to face. Would Desmond know who Ben was somehow from before????? Did Kelvin know who Ben was????? I think not...