The leaders of the rivalling Scottish independence campaigns are set to go head-to-head in front of the TV cameras in what could be a pivotal moment in the run up to the September 18 vote.
Scotland's First Minister and SNP leader Alex Salmond will front the case for independence, while former chancellor Alistair Darling will argue that the UK is Better Together in the debate organised by STV.
The debate, chaired by Bernard Ponsonby, will be broadcast live on ITV Border and online through the STV Player from 8pm.
The first debate between Alistair Darling and Alex Salmond had barely finished when their respective teams went into battle.
Campaign rivals Alex Salmond and Alistair Darling both traded blows in a surprisingly feisty televised debate on Scottish independence.
Alistair Darling is getting 'feisty' during the STV Debate.