Knock, knock. Who's there? Doctor. Doctor who? OK, so it's the oldest supposed joke in the world, but the doctor really is back and coming exclusively to a computer near you this summer.

The half hour, audio-only episode is called Death Comes To Time and features Sylvester McCoy (my second least favorite doctor, but you can,t win them all and a host of such other big English luvvie names such as Stephen Fry and John Sessions.

The episode will be broadcast on the BBCs Doctor Who site www.bbc.co.uk/drwho from July 13 spread over six audio files.

The BBC is promoting the episode as the first ever drama broadcast purely online, which may be technically true, but it was originally recorded in 1998 for Radio Four and was never broadcast, so the Beeb have been looking for ways to offload it to Doctor Who fans ever since.

Even though Sylvester McCoy was the most irritating Doctor and came nowhere near to Sir Tom of Baker, I can only hope and pray that this audio episode will be better than the dreadful American travesty with Paul McGann a few years ago.

Lets hope that the webcast will be so successful that the BBC will finally be persuaded to bring the Doctor back.

We can but dream.

Often when I am surfing the Web I find snippets of news and items that I wish to copy down either for the benefit of this column or my future reference. Until recently the only easy way to do this was to copy and paste out of the site and into a Word document.

It did the job, but left me with a long Word file that I would then have to pick my way through at some time.

A couple of weeks ago I discovered Cogitum Co-Citer which, apart from having a name that sticks in the memory like jelly sticks to a greased plate, is one of those incredible and free tools you soon wonder how you ever did without.

If you are involved in research in any way and use a PC with Internet Explorer, this is the software for you.

Highlight text within a web page, right-click it and save it to the Co-Citer database, a fully indexed and searchable repository for your clips.

Co-Citer is beautifully presented and does its job perfectly.

Grab it from www.cogitum.com. You might like to check out Co-Tracker while there.

It is a similar tool but logs and indexes images from the Web.