The BBC is moving reality show Castaway from its Sunday night slot after ratings dropped to just 2.1 million.
The 13 contestants have to fend for themselves
The hour-long programme has been going out weekly at 2100, but will now get three half-hour slots at 1900 on Sunday, Tuesday and Thursday nights.
"It's true it wasn't working too well," said a BBC spokeswoman, "so we've been trying to find the best place for it."
The show sees 13 contestants surviving on New Zealand's Great Barrier Island for three months.
In the latest episode, Jason, a 37-year-old former drug addict, was the first competitor to be voted off the island.
The original series of Castaway, broadcast seven years ago, lasted a year and saw 36 people spend the time in the Scottish Outer Hebrides.
Ben Fogle was in the first series and is now a television presenter
Seven people left during the course of the year, including Ron Copsey, who later won a settlement of £8,000 from the BBC after claiming he was misrepresented on TV.
But the show made a star of Ben Fogle, who now presents Animal Park and Country File for the BBC.
This year's series started well, attracting 4.1 million viewers, but nearly half of them have now switched off.
Nightly updates on BBC Three have been pulling in around 58,000 viewers - these programmes will also change as part of the new schedule.
Castaway: Exposed, in which celebrities react to the latest happenings in New Zealand, will be broadcast on Sunday, Tuesday and Thursday directly after the main BBC One programme.
Castaway: The Last 24 Hours will be shown at the same time on all other days of the week.
A BBC spokeswoman said: "The feeling is that maybe Castaway needed to reach the audience in a different way.
"We are trying something new and it's actually getting an extra half-an-hour a week."
The show will continue in its regular slot until the changes come into effect in April.