4. The script
While the essential story of the sneaky slacker's Chicago adventure remained the same through shooting and release, the original script for Ferris Bueller has a few telling differences.
For one, Ferris' family is bigger, with younger Siblings Todd and Kimberly featured early on (and, according to differing reports, filmed, but cut from the final print).
And our hero was originally supposed to steal a bond from his father's closet , then take it and cash it alongside Sloane at the bank to fund his wild time - which ended up on the cutting room floor, since Hughes didn't want to make him seem like a thief.
A reference to Ferris telling a radio show that he wanted to ride on the space shuttle before he dies was later snipped following the Challenger accident
There's also no dialogue for the droning economics lecture ladled out by Ben Stein's soporific teacher (you can find more on that on page 6.)
Finally, while Edward McNally and Hughes both knew a Buehler in school, Ferris' surname is largely credited to the director's childhood pal Burt Bueller.
With a script written, Hughes needed a lead...