Five's 8pm hour - made up of documentaries The Mentalist: Revealed and Inside The Mentalist - brought in 1.01m (4.9%) and 1.08m (4.9%). Later, at 9pm, the penultimate episode pulled in 2.1m (9.2%).
Over its 23-episode run, the Simon Baker-fronted series has pulled in an average of 2.25m (10.2%) for Five, with a peak of 3.69m (16.7%) for the series opener on Thursday, March 26.
Over on BBC One last night, As Seen On TV had 2.52m (12.2%) at 8pm, then The Rat Pack took 2.95m (13.4%) at 8.30pm. The audience surged to 6.79m (29.8%) during 9pm hour for the latest episode of New Tricks.
The final episode of Rick Stein's Far Eastern Odyssey averaged 3.04m (14.1%) for BBC Two during the 8pm hour. A half-hour edition of Mock The Week then interested 2.3m (10.1%) at 9pm, then 1.76m (8.4%) tuned in for The Funny Side Of... Animals at 9.30pm.
The Bill put in 3.09m (13.5%) - a drop of 330k on last week's performance - for ITV1 during the 9pm hour.
Channel 4's How Clean Is Your House? had 1.44m (6.9%) at 8pm, then 880k (4%) watched the second episode of Dolce Vito - Dream Restaurant at 8.30pm. The first part of documentary series Benefit Busters followed at 9pm, pulling in 2.23m (9.7%).
The latest visit to the Big Brother house interested 2.05m (11.9%), with a further 183k (2.2%) tuning in on Channel 4+1.
Overall, BBC One came top during primetime with an average share of 22.1% to ITV1's 19.7%. BBC Two was third with 12.8%, followed by Channel 4 with 7.4% (+1: 0.7%) and Five's 7.3%.
Elsewhere, Doctor Who's Greatest Moments drew 405k (2.1%) for BBC Three during the 8pm hour. Tough Guy Or Chicken followed at 9pm, interesting 273k (1.3%).
BARB ratings data supplied by Attentional