In one of her out-of-character moments Francine heads to Hawaii where she spies on soontobe-wed Freddie. Katchoo and David chase after her to bring her home before she can crash the wedding and do something she will regret.
On the flight over David has his chair repeated kicked by a 9 year-old Bjork (according to the SIP Source book)
Casey and Freddie have an awkward time, esp as Freddie keeps sensing/smelling things that remind him of Francine.
David catches a glimpse of the tattoo on Katchoo's breast and brings back some bad memories.