S3·E8 Episode 7

There are 6 left - Is it Alaina, Crystal-Rose or Bob? or someone else? David almost loses the first challenge for the team, having to repeat his part after breaking a road rule. He only makes it home in 2 seconds to spare. Alaina also doesn't help. Through luck alone, Alaina, Crystal-Rose & Marc photograph four native species which contribute to the group's kitty. Bob and the others only manage to get 2 and one of them is doubtful. However, Crystal-Rose, Bob, Marc & Alaina all don't make it through a series of laser beams in the final challenge. Did they do it deliberately? David risks it all to bring home more points and Ann-Maree runs out of time. It seems anyone could have sabotaged these challenges. That night at the elimination, Bob and Alaina say they would like the other to leave. Both of them suspect Marc. He suspects Bob as does David. Crystal suspects David.