As we mark 20 years since the return of Doctor Who, we turn the clock back to those early glory days.

We're delighted to be joined by Dave Turbitt - another Glaswegian, no less - who worked on approvals on Doctor Who at the end of the Davie Tennant era, until Matt Smith's second season.

Get ready for the first of a two-part interview discussing Dave's role, and he talks us through a hypothetical example of how the approvals process worked.