Lifted word for word from the awesome Doctor Who News page:
"The BBC has revealed that BBC Three repeats of The End of Time will have available an audio commentary from outgoing executive producers Russell T Davies and Julie Gardner.
The commentary for part one will be available on Freeview, Virgin and Sky on Sunday 27th December at 7pm, while the commentary for Part Two will only be on Virgin and Sky on Sunday 3rd January at 7pm. Neither commentary will be available on Freesat.
The commentaries are expected to be broadcast on BBC Radio 7 and thus will be available worldwide on the BBC i-player. Part One had been scheduled for 3am on 26th December, but Part Two has yet to be scheduled.
In addition, the Christmas Eve, 9am, BBC Three repeat of Dreamland will also have a commentary, this time with writer Phil Ford and the director Gary Russell."