The Office

John Krasinski was forced to cut his hair for his role in "Leatherheads", so he was forced to wear a wig for the latter half of season 3.

The computers on the Dunder-Mifflin office set are wired for the internet. Cast members have admitted that when they're in the background of scenes they are often checking email and surfing the net.

Some of the video used in the opening theme song specifically the exterior shot of the building was taken by John Krasinski and his friends in their Jeep. John had just gotten the part and was coming out for shooting.