Luke Adams as Young Jeff Dahmer / Young Lionel Dahmer

Rusty Sneary as Adult Jeff Dahmer

Lucille Louise as Baby Jeff Dahmer

Bo Svenson as Detective John Amos

Scott Cordes as Lionel Dahmer

Cathy Barnett as Shari Dahmer

Jeannine Hutchings as Catherine Dahmer

Frankie Krainz as Victim No. 1

Kip Niven as Attorney Howard Parker

Granvile O'Neal as Detective

Walter Coppage as Judge

Jeph Scanlon as Mark Stanton

Kaitlyn Williams as Little Girl

Kathleen Warfel as Dr. Price

Erin McGrane as Joyce Dahmer