The duo will both appear in the 19th episode of the season, which is being directed by Criminal Minds star Matthew Gray Gubler, Entertainment Weekly reports.
Englund will play a detective who helps the team with a number of ritualistic murders in Oregon.
Meanwhile, Landau has signed up to star in the episode as the ghost of a former actress called Catherine Heathridge.
Englund is best known for his role as Freddy Krueger in A Nightmare on Elm Street, while Landau's credits include Buffy the Vampire Slayer and Angel.
Kyle Gallner and Madeleine Martin have already signed up for roles in Englund and Landau's episode of Criminal Minds.
Criminal Minds airs on Wednesdays at 9/8c on CBS.
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