The second half of this season will introduce an entire new cast, while the previous contestants will no longer have a main role in this part.
Fan-favourites played again for £10,000, and some previous contestants also sat in the audience.
With two players left, the previous contestants are brought back as to vote on which of the two would be crowded "King of the Nerds".
The votes are revealed after all previous contestants have placed their vote, and the winner is named.
Contestants enter their 10-15 page increment for the screenplay based on previous contestants' submissions.
Two contestants are siblings of previous Endurance contestants.
Their opponent was then asked whether the actual number was higher or lower than the previous contestant's response.
Marcus takes his lumps more gracefully than any other previous contestant, even cool-as-a-cucumber Leroy Bell.
Each was assisted by a previous contestant eliminated earlier in the competition, selected at random by drawing knives.
Of the performers, many previous contestants returned to the contest this year.