Debbie Dart with Pearl in Mine Walker: Debbie and Pearl meet their biggest challenge in rescue work

Debbie and Pearl race each other to be the first to welcome Pearl's parents on to the Moon, but they get caught by the law. After showing Pearl's parents around the Moon Base, Debbie and Pearl embark on a challenging rescue that involves six trapped coal miners in Wales. Can the two girls figure out a way to rescue the men before their oxygen runs out?Also Debbie is taken hostage by a gun man at Niagara Falls, after rescuing a tightrope walker.