The second story in the recent series of The Sarah Jane Adventures, The Curse of Clyde Langer, had an official audience of 0.76 million viewers, according to Barb.
The figures are an increase on last year's second story, The Vault of Secrets, which had 0.67 million watching, and an increase on the previous weeks episodes.
The two Sarah Jane episodes topped the CBBC chart for the week, with Episode One of The Curse of Clyde Langer getting 0.793 million watching and Episode Two getting 0.733 million.
Third placed Tracy Beaker got 0.433 million watching and Sunday's repeat of The Sarah Jane adventures had 0.402 million watching.
The Series has yet to be shown on the main channel, BBC One and the figures do not include those watching on iPlayer.