just checked that site out for the first time in ages and they’ve added some stuff. (edit) forgot the background here isnt white so copy and paste the tiny writing below cause there’s sorta spoilers in it.
ok, if you’ve finished the season put the “numbers” into the travellers thing at the bottom of the first page. then click find, this will take you to the seating chart of the plane. mess about with this, click on the “numbers” etc at the bottom right there’s a green button what says pre-board check in. It brings up a page with the name “Ethan Rom” and 8 blue boxes, drag the letters into the boxes, it’s an anagram, when you get the letters in the right place you can’t move them. when you complete it it shows you somthing on the screen, pretty cool.