Castle resident and doctor. He is seen kissing Suzanna, then confesses a truth to James about a past death. He is murdered by a gloved hand with a razor, and his body is later moved to the tomb.
Dr. Franz serves as a castle resident who assists in discovering the murders.
Dr. Franz works under Lady Mary's roof, facing potential dismissal due to his affair.
They share the same household and fate, highlighting the killer's methodical approach.
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