When Sarah-Jane left the Tardis at the end of ‘The Hand of Fear’, she said she wanted her hair washed. It must have got pretty dirty during all that time she travelled in the Tardis with you, Doctor. Anyway, it seems she got what she wanted in the end when she turned up in an advert for Vosene medicated saying she and the rest of her family had ‘hair that’s really clean’. Can you ever recall seeing this advert?
A number of such commercials can be found scattered throughout the WWW and some of them seem a bit akin to 'Doctor Who' with their weird theme music and green blobs falling across the screen.