Fancy kicking your weekend off with a bit of comedy? You need look no further than Channel 4 this evening. It's time for the annual Comedy Gala, so there's a full night of stand-up comedy and specially written sketches from London's O2 in aid of Great Ormond Street Hospital. There's no need to hop across the water, because you can see the likes of Michael McIntyre, Jack Dee, Jo Brand, Jonathan Ross, Adam Hills, Russell Brand, Kevin Bridges and Lee Evans from the comfort of your sofa. We hear Alan Carr is up to something special with Warwick Davis too...