S1, E5: After an epic climb in Chile, Kamara and Josh have to answer a tough question. The Controller welcomes a new duo, Grace and Daniella, to St Mark's Square in Venice. Tanaka and James dive into a hidden cave.

S1, E5: After an epic climb in Chile, Kamara and Josh have to answer a tough question. The Controller welcomes a new duo, Grace and Daniella, to St Mark's Square in Venice. Tanaka and James dive into a hidden cave.