Sacrificial Special is the 37th episode of Season 5 and the 306th episode overall. It takes place in 14th Century South America (Incan Empire).
Bob, an Inca priest, is looking for a sacrifice for a sacrificial ritual. Oggy manages to prevent Bob from choosing his beloved Llama. Instead, he proposes the cockroaches that are after the priest's necklace. Plagued by remorse, Oggy finally tries to save the cockroaches.