Davina McCall's Sport Relief documentary attracted 3.65 million on Thursday evening, overnight data reveals.
BBC One's Beyond Breaking Point achieved an audience share of 17.3% at 9pm on a quiet Thursday night.
The One Show was the most-watched programme outside of news and soaps with 4.44m (21.8%) at 7pm. Later, Holiday Hit Squad brought in 3.10m (14.6%), and Question Time was seen by 2.35m (21.8%) at 10.35pm.
On BBC Two, The Hairy Bikers' Asian Adventure cooked with 2.14m (10.1%) at 8pm, while the second part of The Worricker Trilogy - Turks & Caicos - starring Bill Nighy appealed to 2.29m (11.5%) at 9pm.
On ITV, Ade Edmondson's new series Ade at Sea interested 2.63m (12.4%) at 8.30pm, followed by documentary Dangerous Dogs with 1.97m (9.3%) at 9pm (269,000/1.7% on +1).
Channel 4's Hoarder Next Door fascinated 1.47m (6.9%) at 8pm (166k/0.8%). Inside Rolls-Royce gathered 2.13m (10.1%) at 9pm (361k/2.3%) and 8 Out of 10 Cats Does Countdown amused 982k (6.1%) at 10pm (221k/2.7%).
On Channel 5, It Takes a Thief To Catch a Thief intrigued 972k (4.6%) at 8pm (175k/0.8%), followed by The Hotel Inspector with 1.20m (5.7%) at 9pm (110k/0.7%) and Botched Up Bodies with 729k (4.5%) at 10pm.
BBC Three's Junior Paramedics continued with 431k (2.0%) at 9pm, while Bluestone 42 tickled 342k (1.9%) at 10pm.
On ITV2, The Big Reunion entertained 263k (1.2%) at 9pm, while Celebrity Juice dipped to 732k (4.4%) at 10pm (182k/2.1%).
E4's How I Met Your Mother amused 761k (3.6%) at 8.30pm (159k/0.8%), and Brooklyn Nine-Nine gathered 518k (2.5%) at 9pm (134k/0.7%).
On Sky1, Arrow thrilled 319k (1.5%) at 8pm, followed by The Smoke with 217k (1.0%).
