6-1 Hot and Cold
6-2 Steam Cleaning
6-3 Stop Up Top
6-4 Rise and Fall
6-5 Acidic is a cleaner Pipe
6-6 Catch and Release
6-7 Branches and Loops
6-8 Through the Bridge
6-9 Forks and Funnels
6-10 Below the BBQ
6-11 A Race to the Finish
6-12 Revolving Door
6-13 Race the Ooze
6-14 Steam Powered
6-15 Ventilation Shaft
6-16 Steam Quarantine
6-17 Jumping Gigawatts!
6-18 Up is Down
6-19 Through and Through
6-20 Steam Journey