David Tennant's arrival at Sarah Jane's wedding was watched by 1.3 million viewers according to unofficial overnight figures. With an audience share of 10.9% this is roughly double the usual audience for the show and more than three times what CBBC usually gets in this slot.
The rating is the highest by far that The Sarah Jane Adventures have achieved in this time slot. Series One was shown in a later time slot and got figures of around 1.4 million watching. The figures saw BBC One move into third place for this timeslot. Usually the ratings for children's TV are eclipsed by those watching the lifestyle programme on the other four main channels.
The programme was promoted on BBC Breakfast with an appearance from Elisabeth Sladen and Russell T Davies. For Sladen this was a return to studio TC7 in Television Centre. The studio Breakfast is broadcast from is the same studio in which she recorded stories such as Robot over 35 years ago.
Final figures will be released in around two weeks time.
The final part of the story will be shown in the UK this afternoon.
Final figures are now available for the first two programmes in Series Three. Prisoner of the Judoon had 0.73 million watching part one and 0.82 million watching part two. Final figures are more accurate then initial overnight estimates and include those who record the programme and view it within seven days.