As they embark on their seventh series, the Dragons face a new peril. Not panting entrepreneurs with dodgy business plans, but a worse threat - obsolescence. With the economy shrinking and Gerry Robinson throwing struggling firms a lifeline over on Channel 4, the red-blooded, impress-me venture capitalism of the Dragons could start to look out of touch, even a bit tasteless. Sir Alan Sugar adapted to the recession by making the most recent series of The Apprentice more touchy-feely - will the Dragons tame their fire-breathing, too? Preview DVDs weren't available, so we'll have to hope that the formula proves as watchable as ever and that Evan Davis's singsong recaps don't finally send us screaming from the room. In the end, it's hard to argue with the value of a show that has invested more than six million pounds so far in new ventures. Ideas the hopefuls will pitch tonight include eco-friendly patio heaters, cat-friendly collars, personalised romance novels and a hat that seems to make your wrinkles disappear.