Summary
In the first season, miners Ken Foy, Al McGregor, Bernie Kreft, and Karl Knutson each led one of the crews. Cam Johnson's group replaced Bernie Kreft's crew in the second season. Nika Guilbault & Chris St. Jean's group replaced "Big Al" McGregor's crew in the third season. In the fourth season, the Bernie Kreft and "Big Al" McGregor crews rejoined the show, alongside the operations of Ken Foy & Guillaume Brodeur, Karl Knutson, and Nika Guilbault & Chris St. Jean. In the fifth season, the operations of Karl Knutson, Bernie Kreft, and Ken Foy & Guillaume Brodeur left the show, while the crews of "Big Al" McGregor and Nika Guilbault & Chris St. Jean returned. They were joined by the crews of Riley Gibson & Ed Long, and Andy Tai & Paul "P.J." Joseph. ==Episodes==