Check out this article: "Former Hostages Allege Iran's New President Was Captor". My own opinion is that the picture of the captor, placed next to the photo of the new Iranian president taken at about the same time, shows two different people. But wouldn't it be interesting if they are the same person?
Just think how different our recent history would have been if George W. Bush had been President when the hostages were taken in 1979, instead of Jimmah Carter. I bet the helicopters wouldn't have broken down, at the very least.