In “Dickensian,” characters from Charles Dickens’ novels, such as Scrooge, Fagin, and Miss Havisham, come together in a series of half-hour episodes. Their stories are interwoven in the setting of 19th-century London. The Old Curiosity Shop is located beside The Three Cripples Pub, and Fagin’s Den is tucked away in a shadowy alley off a lively Victorian street.