Let's Kill Hitler had a final consolidated rating of 8.1 million viewers.
The programme had a share of 33.3% of the total TV audience and was the most watched programme of the day on BBC One. The nearest programme on the channel was Casualty which had a final rating of 5.19 million.
Consolidated figures include those who record and watch the programme within seven days. The final rating is much more accurate than the initial overnight figure and is based on the actual broadcast time of the programme rather than its scheduled time.
The figues do not include those watching on iPlayer, where Let's Kill Hitler has already been accessed over 1 million times.
The final figure for Let's Hill Hitler is the second highest of the series so far, The Impossible Astronaut had 8.86 million watching. It is the highest ever rating for the eighth episode in a series since the show returned in 2005.
A chart position will be released later this week when final figures from the whole week are available.