The Musketeers closed to nearly 3 million viewers on BBC One.
The final episode in the second season attracted an average audience of 2.78 million (12.7%) from 9pm.
It was preceded by Masterchef, which was one of BBC One's highest-rated highest-rated shows of the evening with 4.47 million (20.5%) viewers.
BBC One's evening kicked off with 4.59 million (26.6%) for The One Show at 7pm, followed by 3.84 million (20.5%) for Room 101 at 7.30pm.
The evening ended with 1.52 million (13.7%) for a repeat of New Tricks at 10.35pm.
ITV scored its own ratings victory on Friday evening, as an average of 5.21 million viewers tuned in to watch the Euro 2016 qualifier between England and Lithuania.
Over on BBC Two, an improved audience of 1.05 million (5.9%) watched Britain's Got the Builders In at 7pm, followed by 1.99 million (9.1%) for An Island Parish.
Gardeners' World secured an evening high of 2.34 million (10.7%) for the channel at 8.30pm, while Mastermind was seen by 2.04 million (9.3%) immediately after.
Despite a slight dip in viewers, Gogglebox comfortably remained Channel 4's highest-rated show, pulling in average audience of 2.96 million (13.5% at 9pm.
The return of Marvel's Agents of SHIELD drew 750k viewers (3.4%) at 8pm, while Alan Carr: Chatty Man dropped to 1.45 million (99%) viewers.
Channel 5's showing of NCIS: New Orleans entertained 746k (3.4%) at 9pm, followed by 761k (4.8%) for NCIS at 10pm.
