Behind the Screen: The Challenge: War of the Worlds - Julia Nolan
For over two decades, MTV's The Challenge has been the proving ground where reality TV's fiercest competitors come to cement their legacies. What started as a Real World/Road Rules spinoff has evolved into one of the most physically and mentally demanding competition series on television.
The franchise's expansion — with spinoffs in the USA, UK, Argentina, and Australia — speaks to a global appetite for the brand of cutthroat competition and alliance-driven gameplay that Vevmo's community has been tracking since 2007.

I don't know how to tell the difference. On Big Brother I don't remember which was the original, which was the replacement...
— TheKorean