Isabelle Tyler

Isabelle Tyler is a fictional character on the USA Network science fiction television series The 4400.

The daughter of Richard Tyler and Lily Moore, Isabelle is technically not a 4400; she was born after the 4400 were returned, after the first season of the show.

Lily discovers quickly after her return she is pregnant. The baby inside her is capable of communicating with her, making Lily feel unwell if there is danger- or, in the case when Lily sees her daughter, Heidi, when the baby is jealous. Lily knows early on that the baby will be a girl.

When Jordan Collier attempts to stop Lily and Richard from leaving his complex, he touches Lily's stomach. The fetus inflicts severe injuries on him, that even Shawn Farrell cannot fully heal months later.