The Block ices competition on Tuesday

Viewer interest in The Block shows no signs of abating with another 1.21m viewers tuning in last night for a Mt. Buller challenge, far removed from its Elsternwick site. Once again it was twice the size of the competition.

But Australian Survivor managed to score second place at 625,000 viewers leaving First Dates and 7:30 to battle it out for remaining places. SBS newcomer Secrets of Our Cities debuted with 319,000 viewers, likely to rank high across its week.

At 8:40pm The Big Bang Theory outranked 800 Words which at 587,00 was down on last week’s 633,000. Catalyst and NCIS followed.

Nine News, ACA and The Chase all won their slots.

Nine network won Tuesday with 32.5% then Seven 26.6%, TEN 18.5%, ABC 15.0% and 7.4%.

The Block was #1 for Nine with 1.21m viewers then Nine News (980,000 / 934,000), The Big Bang Theory (796,000), A Current Affair (785,000), Kath & Kim (489,000 / 416,000) and Hot Seat (485,000 / 277,000). 2 Broke Girls was 205,000.

Seven News (947,000 / 918,000) led for Seven then Home and Away (673,000), 800 Words (587,000) The Chase (560,000 / 371,000) and First Dates (538,000). Ramsay’s Kitchen Nightmares USA was 183,000.

Australian Survivor (625,000), The Project (559,000 / 366,000), TEN Eyewitness News (440,000), Family Feud (341,000), NCIS (285,000) and NCIS: LA (236,000) comprised TEN’s night.

On ABC it was ABC News (729,000), 7:30 (533,000), Catalyst (399,000), David Attenborough’s Micro Monsters (319,000), Grand Designs (191,000) and Inside London Fire Brigade (189,000).

Secrets of Our Cities debuted with 319,000 for SBS then Insight (215,000), SBS World News (169,000) and Dateline (109,000).

Shaun the Sheep had a daggy 217,000 on multichannels.

The Morning Show: 153,000 / 89,000
Today Extra: 127,000 / 81,000
Studio 10: 80,000 / 78,000 / 47,000

OzTAM Overnights: Tuesday 26 September 2017.