I heard there was something fishy going on in First Class.

Hint 1 of 22:

Yes, there is.

Hint 2 of 22:

It's so fishy, it might even make the evening news.

Hint 3 of 22:

Try turning on one of the TV's on board and flip through the channels.

Hint 4 of 22:

Channel 4 is showing a room chevron.  Why don't you try to figure out where
that room is located?

Hint 5 of 22:

You'll need to manually edit the chevron displaying in your PET by holding
SHIFT and clicking on the pieces of the chevron until it matches what you see
on the screen.