The 9pm screening of the series eight opener, which stars Peter Frith, Hermione Norris and Richard Armitage, pulled in a decent 6.01m (24.8%).
Previously, series five opened to 5.89m (24.9%) on September 17, 2006, 6.25m (27.7%) watched the first episode of series six on October 16, 2007, and the series seven opener drew 5.5m (23.4%) on October 27 last year.
Earlier on BBC One, Waterloo Road logged 5.41m (22.6%).
Natural World and Badlands Raging Bulls took 2.37m (10%) and 2.27m (9.3%) at 8pm and 8.50pm, then 2.38m (9.8%) watched Andrew Marr's The Making Of Modern Britain during the 9pm hour.
Over on Channel 4, the 8pm Ruth Watson's Hotel Rescue managed 1.88m (7.9%), the new series of The Family opened to 2.27m (9.3%) at 9pm, and 1.16m (7.4%) tuned in for the latest instalment of True Blood at 10pm.
Five's Britain's Best Brain, hosted by Jamie Theakston and Zoe Ball, put in 707k (3%) at 8pm, dropping slightly from last week's slow start. Maid In Manhattan followed, drawing 1.08m (5.3%) between 9pm and 11.10pm.
ITV1's live coverage of the Olympique Lyonnais vs. Liverpool Champions League game averaged 5.15m (21.7%) between 7.30pm and 10pm.
BARB ratings data supplied by Attentional