From the moment the spotlight falls on the leaders' podiums, their advisers will be trying to put the best possible gloss on their performance.
Make no mistake - the parties are taking this very seriously indeed.
Last night there wasn't one particular knockout blow but the political landscape in Britain does seem to be shifting.
Another day on the election trail and the campaign catchphrase is starting to bite.
Leaders' Debate shows was how our political horizon has suddenly changed as smaller parties did all they could to make themselves heard.