The League aid the Justice Guild against their arch-nemeses while trying to unravel the secrets of the Guild's world.
| Name | Type | Role | |
|---|---|---|---|
| Andrew Kreisberg | Writer | ||
| Jeffrey Jones | Guest Star | ||
| Stephen Root | Guest Star | ||
| William Katt | Guest Star | ||
| Udo Kier | Guest Star | ||
| Ted McGinley | Guest Star | ||
| Michael McKean | Guest Star | ||
| Jennifer Hale | Guest Star | ||
| David Naughton | Guest Star | ||
| Corey Burton | Guest Star | ||
| Neil Patrick Harris | Guest Star | ||
| Dan Riba | Director |