Doctor Who - Smile had an overnight viewing audience of 4.25 million viewers, a share of 22.9% of the total TV audience, according to unofficial figures.
Top for the day was the ITV show Britain's Got Talent, with 9.21 million watching, a massive 44% of the total audience. The remainder of the evening was dominated by BBC One with All Round to Mrs Brown's getting 5.03 million. The FA Cup averaged around 5 million viewers pushing Doctor Who into fourth place for the day.
Official ratings data, included those who timeshift the episode, will be released in 8 days time.
The early morning signed repeat of The Pilot, shown on BBC Two at 4.10am, had an average audience of 129,000 viewers, a 13.9% share of the available audience.