Some 2.03m (7.9%) watched Fry's new three-part series at 8.30pm, while The All New Gadget Show interested 766k (3%) over on 5.
Stephen Fry: Gadget Man also beat BBC One's Panorama (1.88m/7.4%), but fell short of matching MasterChef: The Professionals (2.87m/11.2%) on BBC Two.
I'm a Celebrity... Get Me Out of Here's impressive form has continued to its second week, with 9.32m (38.8%) recorded for the hour-long visit to the Australian jungle, as well as 379,000 on ITV1 +1.
Currently, the 12th series is averaging nearly 300k viewers and almost three share points more than 2011's run.
Spinoff I'm a Celebrity... Get Me Out of Here Now, screened an hour after the normal show finished at 11pm, dipped to 458k (5.4%) on ITV2.
Elsewhere in the 9pm hour, Richard Hammond's Miracles of Nature aired on BBC One to an audience of 2.39m (9.8%), while The Dark Charisma of Adolf Hitler managed 2.08m (8.6%), and Channel 5's screening of The Contract attracted 822k (4%).
Meanwhile, 8pm's University Challenge (3.09m/12.5%) was BBC Two's best-rated broadcast of the night, losing out marginally to ITV1's Little England which had 3.38m (13.7%).
Overall, ITV1 crushed BBC One in primetime with 29.3% (+1: 0.8%) versus 15.9%. BBC Two earned third place with 8.7%, ahead of Channel 4's 5% (+1: 1%), and Channel 5's 3.1% (+1: 0.1%).
On the multichannels, an old Doc Martin (933k/3.8%) on ITV3 replaced BBC Four's Only Connect (856k/3.3%) as leader, while 800k (3.2%) caught Arrow, and ITV2's Switch (358k/2.1%) extended its winning record over E4's Made in Chelsea (339k/2.1%) to a month.
BARB ratings data supplied by Attentional