This is the payoff for all the set-up I did at the beginning of the chapter with Spy Gal and Jerry.  Wait, I take that back, you don’t really get the payoff for this until Chapter 5, but this is the beginning.
Pants.  Always good for a joke.
Spy Gal growing suspicious of Dr. Klein threw me.  This is one of those times when the character told me how it was going to go down.  She’s just too smart.  No way she wouldn’t start putting it together.  So, I actually got two payoffs in this strip as the first two strips in this chapter were all about the friction between Dr. Klein and Spy Gal.