Thunderbirds 2086 Restoration Episode 4 Snowbound V1.1

It looks just like another day up at the ski resort, however, all of that changes in a matter in minutes for the monotrain, Snowland. A landslide of rock and snow traps the Snowland in one of the tunnels in the mountain. Also the Snowland has derailed, crashed, and is on fire, and with the tunnel sealed on either end, the air supply for the survivors is running out very quickly. Will the Thunderbirds make it in time and save everybody, or will this tunnel be the survivors crypt?