Re: There's a lot of people you don't initially notice...

How about Twin Peaks and Seinfeld?

Grace Zabriskie (Mrs. Palmer) and Warren Frost (Dr. Hayward) played George's 
fiancee Susan's parents.

Frances Bay (Mrs. Tremond/Chalfont) bought the last babka that Jerry stole 
from her on the street.

Jacques Renault (can't remember his real name right now) was the cable guy 
trying to catch Kramer stealing cable.

And Thomas Eckerd's assistant, who drugged and tried to kill Harry, was the 
chocolate bar heiress who wore a bra as a top.

                 --Jeffrey