Henry's ship's Plasma Shifter (lava lamp) is so close. He needs to get the Plasma Propogator for the Dockworker first.

Henry wishes he had his jetpack. Perhaps there's something else that can fly?

If you speak to Maax (at the spaceship), she will lend you Maari (the flying robot).

Head back to the sewer. Maari will be floating just to the right of the platform.

Click on Maari. Its going to carry you to the Plasma Propogator. Experiment with the whistle commands.

Long whistle makes Maari go up. Short whistle makes Maari go down. Loud whistle makes Maari go left. Soft whistle makes Maari go right.

You'll need some combination of four soft whistles and three short whistles, the first time you try.

You'll need the soft whistle three times, then the long whistle. Then you'll need soft again, possibly twice. (That's what I did.) Then use short probably four times to go down and loud to go left. You're aiming for the fluoro yellow canister type thing under the lava lamp.

You need to wait next to the yellow beam and be ready to select the soft whistle twice.

When you've correctly navigated to the Plasma Propogator, the chapter will end.