Executive producer

Doctor Who
The title of Executive producer was only used in the original series during Season 18. The BBC, concerned that John Nathan-Turner lacked the experience as producer for the show, assigned Barry Letts to the position for Nathan-Turner's first year on the job.

It is now a consistent job in the production of the new series. Russell T Davies and Julie Gardner were the executive producers through to The End of Time, joined by Mal Young for the first series. They have been replaced by Steven Moffat, Piers Wenger and Beth Willis.

Torchwood and The Sarah Jane Adventures
Davies and Gardner were also executive producer throughout Torchwood and The Sarah Jane Adventures. For series 4, Torchwood added Jane Tranter and (for the first episode The New World only) Bharat Nalluri.

Davies and Gardner were joined by Doctor Who producer Phil Collinson for series 1 of The Sarah Jane Adventures. For series 3, Piers Wenger took this slot. Gardner and Wenger both left after series 3 and were followed by Nikki Smith in series 4.

K9
Jim Howell, Grant Bradley and Steve Robbins were executive producers for K9.