It’s with a heavy heart that I advise you to watch Who Do You Think You Are? (BBC1, Thursday, 9pm) as at the same time on BBC2 is Mock The Week and Saxondale. If you’re not a fan of alt.comedy, then BBC1 is the only place to be. Of course, WDYTYA? is a show that pokes around the history of a celebrity and their family tree. It’s always interesting stuff. I recall Jeremy Clarkson getting a revelation about a distant relative of his inventing the Kilner Jar but essentially drinking and gambling the profits up the wall.

This week we get to follow Griff Rhys Jones (is there are name more Welsh than his?) which sees his eternal chipperness taking a bit of a kicking. In the show, we get to watch one of the nicest blokes in TV (as we’ve seen countless times in his Restoration shows) going from being “unutterably” bored by the prospect of his family history to the revelation of a deeply buried family secret emerging about the death of his grandparents. “Now I’ve got to tell my poor mother. Thanks very much, Who Do You Think You Are?”. A fascinating and sad story unfolds and gently grabs the viewer and Rhys-Jones into the past to make for a fabulous TV show.