The winning couple, Susan McFadden and Danny Bayne, went on to star in a long-running West End production of Grease at the Piccadilly Theatre.
Greased Lightnin shows extra unseen auditions, behind the scenes gossip and exclusive interviews with the judges and contestants.
The following two weeks, were the Danny and Sandy semi-finals, respectively, with the singers competing as soloists, with the judges eliminating the first and the viewers the second victim of the nights.
David Ian gathered the finalists at the Piccadilly Theatre in London's West End to tell them that the judges "hadn't got it right with the pairs.
Each of the Danny and Sandy specials eliminated 2 of the 4 hopefuls thus leaving only 4 finalists for the final vote on 9 June.