Valenzetti Equation

On the Lost Connections section of the bonus disk, start with Jack, click the connection on the right side on the top. That takes you to Desmond.

Click the left side top connection and it will take you to a green screen that is the "hatch computer". Yes, it's beeping. Use your DVD remote to enter the numbers (4, 8, 15, 16, 23, 42) and hit enter. This takes you to a new connection which is the "numbers" connections. The left side top connection contains an Easter Egg about the Valenzetti Equation written by Gary Troup.