The post-apocalyptic drama attracted an average audience of 1.39 million and a 6.5% audience share at 9pm, with an added 351,000 (2.1%) on +1. It also easily topped the multichannels for the day.
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On BBC One, John Bishop's Australia topped the night overall outside soaps with its first episode, bringing in 4.24m (19.7%) at 9pm.
Earlier, How Safe is Your House appealed to 2.83m (14.3%) at 7.30pm, while Panorama intrigued 2.20m (10.4%) at 8.30pm. Documentary Guilty By Association was seen by 1.77m (15.7%) at 10.35pm.
BBC Two's University Challenge documentary educated 1.31m (6.6%) at 7.30pm, followed by The Rhs Hampton Court Palace Flower Show coverage with 1.66m (7.9%) at 8.30pm. Scotland: For Richer or Poorer interested 1.36m (6.3%) at 9pm, followed by a Qi repeat with 1.27m (6.9%) at 10pm.
ITV's Countryfile appealed to 2.83m (16.2%) at 8pm,