My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Corrected entry: Leela licks each of her four fingers only once but the sound of licking a finger plays five times.
My Problem With Popplers (a.k.a. The Problem With Popplers) - S2-E18
Corrected entry: When Luur announces that they will eat 'the first earthling' who ate one of their young, he announces that it was Leela. Leela isn't an earthling.
Correction: Yes she is. It is revealed in season 4 that she is in fact a mutant and therefore technically an earthling. She didn't know it at the time, but it had been hinted at in previous episodes.
Correction: She licks her thumb twice.