The League discover the secret behind the "Black Heart" gem, but everyone except the Flash is possessed, and he must save the day before the sun is destroyed.
| Name | Type | Role | |
|---|---|---|---|
| Joseph Kuhr | Writer | ||
| Bruce McGill | Guest Star | ||
| Tracey Walter | Guest Star | ||
| Enrico Colantoni | Guest Star | ||
| Brian Doyle-Murray | Guest Star | ||
| Dan Riba | Director |