Campbell Live last night beat the TV One 7pm show Seven Sharp overall audience for the first time since Campbell Live began in 2005.
It is also the first time TV3 has ever beaten TV One in the 7pm weekday slot since TV3 began in November 1989.
Seven Sharp took another hit in the ratings on Tuesday night after a short recovery in Monday's show, according to overnight ratings from Nielsen TAM.
The overnight ratings are significant, with Seven Sharp last night providing the most accomplished performance so far. Fewer people would have seen the signs of improvement on the show.
The audience for people aged over five years is an indicator of the total audience, which is dominated by TV One . Last night's ratings illustrate the danger that older Seven Sharp's viewers - carried over by its predecessor, Close Up - are migrating to Campbell Live.