Rachel's amnesia causes her to forget everything she knows, including everything about being an Animorph, and the battle against the Yeerks. She unknowingly wanders into a human-Controller infested area and is about to be taken by the Yeerks. Marco, Jake, and Cassie have to not only save her, but restore her memory.
|Jake||Golden Retriever (Homer), White Tiger|
|Rachel||Red-tailed hawk, Lion|
|Tobias||Red-tailed Hawk (Nothlit)|
- Volume 5 ("The Forgotten", "The Leader" parts 1 and 2)
|Season 1||My Name is Jake | Underground | On the Run | Between Friends | The Message | The Escape | The Alien | The Reaction | The Stranger | The Forgotten | The Capture | The Leader | Tobias | Not My Problem | The Release | Face Off Parts 1 and 2|
|Season 2||Face Off Part 3 | My Name is Erek | Changes | The Front|