On Disc 1 Go to the scene selections for the following episodes…
"Never Name a Duck"
The Two Faces of Rob"
"The Attempted Marriage"
"Hustling The Hustler"
"What's in a middle name"
Highlight the "Opening Titles" on each of these episodes and Press "Left", Dick's head will light up, press your Enter button and you will see various commercials for Dash Laundry detergent and Kent Cigarettes featuring Dick Van Dyke and the cast.
Carl Reiner and Dick Van Dyke allude to this egg on the commentary for "My Husband is Not a Drunk".