The 100 scored E4's biggest ever programme launch on Monday, according to overnight figures.
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.
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, while a repeat of The Cube entertained 2.22m (10.3%) at 9pm (118k/0.7% on +1).
On Channel 4, Jamie's Money Saving Meals brought in 777k (3.7%) at 8.30pm (139k/0.6%). Lance Armstrong documentary The Armstrong Lie was seen by 724k (4.2%) at 9pm (142k/1.3%).
Channel 5's Police Interceptors attracted 903k (4.4%) at 8pm, followed by Benefits Britain with 2.24m (10.4%) at 9pm (271k/1.6%) and Big Brother: Power Trip with 1.31m (7.8%) at 10pm.
On BBC Four, the final of Only Connect puzzled 831k (3.9%) at 8.30pm, while Tales from the Royal Wardrobe also interested 831k (3.9%) at 9pm.
