Benefiting from the end of archeological thriller 'Bonekickers' on BBC One, 'The Secret Millionaire' jumped from last week's 3.7m to 4.2m.
This was an 18.7% share of the 9-10pm audience for the programme, which this week showed property mogul Nick Leslau spending time in Glasgow's Possilpark district as a volunteer carer for disabled people.
Including the ratings from Channel 4+1, the programme was watched by 4.5m viewers, giving it a 20.1% share.
BBC One replaced 'Bonekickers' with heavily trailed documentary 'Pedigree Dogs Exposed', which looked at concerns that the breeding of canines for show was accentuating the diseases they suffer from.
The programme was watched by 3.9m viewers and earned a 17.3% share.
Viewers again shunned fashion experts Trinny and Susannah on ITV1; their second 'Undress the Nation' series debuted with 2.75m and a 13.2% share on Wednesday July 30 but was down to a new low of 2.1m and a 9.4% share last night.
ITV yesterday refused to comment on a Daily Mail report claiming the series would be axed after its third outing.
BBC Two's new celebrities-become-orchestra conductors reality series 'Maestro' recorded 1.8m viewers, up slightly from last week's opening programme, and a 7.8% share.
Five beat both ITV1 and BBC Two with 2.7m tuning in for 'CSI: Miami', a 11.7% share.
Continuing Olympic success for Britain gave BBC One's 7-8pm highlights show 6m viewers, nearly beating 'Emmerdale's' 6.5m.
The live morning Games coverage brought in 3.1m, a 43% share, and the afternoon drew 4m, a 41.5% share.
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