Suggestions by @ifancasttoo

Paul Bettany

as The Secret Antagonist in Maximus Knight (Season Four)

Spoiler

as The Secret Antagonist in Maximus Knight (Season Four)

George MacKay

as Green Blackout in Maximus Knight (Season Four)

Justice Smith

as The Iron Knight in Maximus Knight (Season Four)

Jacob Elordi

as The Muscular Terrific in Maximus Knight (Season Four)

Keke Palmer

as Crimson Hornet in Maximus Knight (Season Four)

Madison Lintz

as Clandestine in Maximus Knight (Season Four)

Mason Dye

as Goldenheart in Maximus Knight (Season Four)

Paul Bettany

as The Facade ❌ in Maximus Knight (Season Four)

Winston Duke

as Steel Defender in Maximus Knight (Season Four)

Lee Pace

as Vitus Maximus in Maximus Knight (Season Four)

Tatiana Maslany

as Interval in Maximus Knight (Season Four)

Gemma Chan

as Gratia in Maximus Knight (Season Four)

David Harbour

as The Stronghold in Maximus Knight (Season Four)

Lashana Lynch

as The Orbit in Maximus Knight (Season Four)

Benedict Cumberbatch

as Duko Vunis in Maximus Knight (Season Four)

Rebecca Ferguson

as The Angel in Maximus Knight (Season Four)

Toni Collette

as Katherine Hitchcock ❌ in Maximus Knight (Season Four)

Michael Sheen

as Richard Hitchcock Sr. ❌ in Maximus Knight (Season Four)

Oliver Platt

as Jonathan Ross in Maximus Knight (Season Four)