witch episode is it

i bought the dvd with the one and sadly only season, i remember watching this on sky channel, enyone else remember sky channel, they showed Hazel, greenacres the monkeys the flying nun, hogans heroes etc and gidget, and many moore.
damn that rubert murdoc to hell for bying that channel, he completeley ruined it, no more fantasy island, and remember dan tanna in Vegas, with the t-bird car parked in his house, and the ditzy secretary.oooh im getting goosebumps just thinking about it, good times.

anyhoo, i have as above mentioned recaptured some of it by buying gidget, i remember an episode were gidget comes home, she`s going to a dance or something, anyway she finds a note from her father with a note in the fridge i think, it is a riddle, she figures it out goes thru the house and finds other notes, eventyally she ends up in the study(i think) where her father has stashed a box with a new dress for her to wear, it is such a cute episode, my problem is, i am convinced that i have seen all the episodes on dvd now and i can not find that scene, can anybody tell me if this sounds familiar, and in witch episode it is in, that is if i haven`t imagined it

thank`s