4.38 Million viewers watched Doctor Who: Before the Flood, according to unofficial overnight viewing figures.
The programme had an audience share of 21.5%, up from last weeks share of just 16%, helped by the lower rating for the Rugby World Cup on ITV. This week, with England out of the competition, an average of just 3.51 million tuned in to see the host country play Uruguay.
Top for the day was Strictly Come Dancing with 8.91 million watching, while ITV's highest audience was for the Rugby, but not for the match showing opposite The Doctor. Australia v Wales at 4.30pm had 4.75 million watching.
Casualty edged just above The Doctor with 4.42 million views pushing Doctor Who into 4th place for the day. Doctor Who is currently 33rd for the week.
Official consolidated figures will be released next week.