Yay, Graham's back and once again there is a reason to stay in on Friday nights. He's terrific, and has injected bright new life into the post-news chat-show slot vacated by you-know-who last year. I love the dynamic of the Norton sofa, where guests turn up en masse rather than separately, which leads to some funny and occasionally weird interaction, or lack of interaction (remember a worried-looking Maggie Gyllenhaal staring in bafflement at comedian Russell Howard?). So far in Norton's reign, my favourite odd couples are big, smiley Hollywood hunk Bradley Cooper, who took a shine to our own Jo Brand, and one of tonight's guests, Catherine Tate, who was "romanced" by rapper 50 Cent the last time she appeared. Tate, last seen as Howard Donald in Comic Relief's Fake That, joins her old mucker and former Doctor Who, David Tennant. Grammy Award nominee Josh Groban provides the music.