This is where we start to see the silly temper tantrums and super effeminate behaviour of Dr. Smith. I use to love this episode but now when I watch it all I see is the beginnings of the shows changes to silliness and stupidity.
The basis of a drought and the family searching for water is great but the heavy plot stops there. Dr. Smith and Debbie eat some strange fruit and grow giant sized. Dr.Smith becomes a pain in the rump and plans revenge on the Robinson's for his change and Debbie is just well... a monkey with a bad hat.