Robert Irvine counts down the biggest restaurant transformations in Restaurant: Impossible history.

In 2014, Robert Irvine visited Mama E's, a soul food restaurant in Oklahoma City, and he was met with an explosive relationship between the married owners, Keith and Stephanie. Unable to get them to even talk to each other, Robert was faced with the possibility of not completing his mission. As he always does, Robert made great strides with the owners and eventually handed them the restaurant of their dreams. As he revisits Mama E's for the first time in six years, Robert finds whether Keith and Stephanie were able to overcome marital obstacles to run a successful business, or if they've reverted to old ways.