The Sarah Jane Adventures topped the weekly ratings for CBBC with both parts of the series opener getting a confirmed rating of over half a million viewers according to figures released by BARB.
The Nightmare Man Part Two topped the charts with 0.67 million viewers with Part One getting 0.59 million watching.
The score is the highest rating for the channel since January and the third highest of the year so far, beaten by Tracey Beaker Returns.
The two episodes were repeated later in the week on BBC Two where overnight figures give the story an additional 0.21 million for Part One and 0.31 million for Part two. Final figures for these broadcasts will be out later this month.
The ratings are slightly higher than the series opener last year although are split over two showings.