Jonathan Strange & Mr. Norrell - Season 1 Episode 5 -

Strange returns home a hero after helping to win the Battle of Waterloo, and resolves to write a book on ancient magic - to Norrell's horror. Strange's hopes for the future are shattered by a tragedy in his life, and following a confrontation with Norrell, he flees the country, determined to learn the truth about the fairy world - even if doing so costs him his sanity.