Now You See It, Now You Don't

S3 E7: While passing by a tunnel, Guilmon begins to disappear. Worried that Guilmon would disapear forever, he seeks advice from the other Tamers to see why it was happenning. It turns out that Mitsuo Yamaki was running a prototype of a program that would trap and eradicate Digimon. When Guilmon disappears before Takato's eyes, the Tamers seek to rescue him. Plunging into the energy field set by Yamaki, Takato rescues Guilmon from deletion.