The duration of Extra Challenge is 2700.0 seconds.
The duration of Ambridge Extra is 900.0 seconds.
The duration of Celebrity Extra is 1800.0 seconds.
The duration of The Extra is 1.6 hours.
The duration of Family Challenge is 3600.0 seconds.
The duration of Challenge of a Lifetime is 1.55 hours.
The duration of Infinite Challenge is -4800.0 seconds.
The duration of Karaoke Challenge is 1800.0 seconds.
The duration of Sports Challenge is 1800.0 seconds.
The duration of Challenge of the GoBots is 1800.0 seconds.
The duration of Challenge to Be Free is 1.47 hours.
The duration of A Challenge to Democracy is 1260.0 seconds.
The duration of Sharpe's Challenge is 2.3 hours.
The duration of Postcode Challenge is 1800.0 seconds.
The duration of The Last Challenge is 1.75 hours.
The duration of Scrapheap Challenge is 3120.0 seconds.