I just find it kind of weird that it's a Sandy episode but then it turns into a Plankton episode. If it had happened earlier it would've felt less weird. To be fair, yes, the thing Plankton building was technically in the beginning, but then the part between the exposition to the conflict of being stuck inside and Sandy finding out Plankton is doing something is kinda boring. It has some decent jokes but nothing actually happens other than some jokes that either make you laugh or not.