Digimon Tamers Episode 15
Dub Name: Snakes, Trains and Digimon
Japanese Name: A Giant Snake Appears! The Great Edo Line Panic

Summary:
Takato meets Henry and Rika in the park in the morning and shows off a team flag he made for them. They are all uninterested and the next day all go there own way. Takato is with his friends playing with Guilmon in the park. Rika ends up in the subway station with her grandma. Sandiramon attacks the subways and destroys a subway car. Henry saves all the people inside before they are deleted as well. Renamon and Terriermon digivolve but it's not enough to win. Impmon sees their trouble and goes to get Takato to help them! (could this be Impmon's showing of his true colors?) Guilmon digivolves and Growlmon and Gargomon combined deleted the second Deva.