Forgo the haunted houses and costume contests for a more subdued Halloween experience. The Royal Underground Theatre Company presents an updated version of the classic Jekyll & Hyde at Fort Mason's Southside Theater. Convinced that the cure for his father's mental illness lies in the separation of man's evil nature from his good nature, Dr. Henry Jekyll unwittingly unleashes his own dark side, wreaking havoc in the streets of late 19th-century London as the savage Edward Hyde.