The two of them can both be seen in much brighter times in some just-released promo art for the season though.
In one photo, Diem mock chokes on-again/off-again boyfriend Chris "CT" Tamburello, as he makes kiss lips in her general direction. In another, Knight poses with his ex-girlfriend Jemmye.
The season will be dedicated to both of the late reality stars.
According to MTV, the new season "takes 26 of the most infamous former flames, recent splits and, for the first time in series history, fresh faces from another MTV reality series, 'Are You The One?,' to Panama for one of the most unpredictable Challenge formats yet."
The grand prize: $350,000.
Check out the gallery above to see who else is competing this season. The show returns to MTV on January 6, 2015.