 "The Invasion" was adapted as part of the "Animorphs" TV series, which aired on Nickelodeon and YTV between the fall of 1998 and the spring of 2000.The first book in the series was covered by the first three episodes, "My Name is Jake" (Parts 1 & 2)", and "Underground".The TV episodes did not follow the books faithfully, altering many aspects of the characters' roles within the Animorphs, the events in the war against the Yeerks, and added plot lines that were not present in the books.