Presented by Jeremy Paxman
As if we hadn't had enough excitement with the launches of the Labour and Tory manifestos, today Nick Clegg unveiled the Liberal Democrats' offering.
It promises to "hardwire fairness into British society" by, among other things, raising the personal tax allowance to £10,000 per person.
They say they'll pay for it by restricting pension tax relief to the basic rate and clawing back over £4bn lost to tax avoidance each year.
It all adds up, they claim.
We'll be asking the party's Deputy Leader and Shadow Chancellor Vince Cable if it really does.
And Michael Crick followed Nick Clegg to Oldham - where an unseemly spat over dirty tricks allegations has been playing out between the Lib Dems and Labour.
If your preferred party has no chance of winning where you live, should you consider voting for the least worst party that might?
David Grossman will be investigating the use of tactical voting - he's been to the marginal Labour-held seat of Hastings to see if it can work.
Electoral politics is about to change forever in this country.
Tomorrow the leaders of the three main Westminster parties will debate live on television for the first time.
David Cameron says he's worried the public might feel short-changed and that the debate format may end up being "a bit slow and sluggish".
We'll have the latest on the preparations by the party leaders and our political panel will hold their own debate.
Also tonight, the comedian Danny Robins will be trying to find out if political messages might be more effective in song.
He has three candidates on board and leading bands and songwriters in tow.
The experiment starts tonight, complete with barber shop quartet.
Join Jeremy for all that at 10.30pm
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