I saw these two episodes yesterday - definitely new ones as I'd never before seen them.
"Pet or Pests" has to do with SpongeBob accidentally ruining the nest of a worm, he takes it home, Gary hates it, the worm then gives birth to a litter of five baby worms, and SB needs to find homes for them all.
"Komputer Overload" is a Plankton-themed episode where Plankton dumps Karen (his computer "wife") after building three "super computers" to help him steal the Krabby Patty formula. Needless to say, his plan fails somewhat miserably (doesn't it always?
) and he begs Karen to come back.