Watch full Batman: Gotham by Gaslight 2018 online full HD. Cartoon movies Batman: Gotham by Gaslight 2018 online for free in HD. In an age of mystery and superstition, how would the people of Gotham react to a weird creature of the night, a bat-garbed vigilante feared by the guilty and the innocent alike? The very first Elseworlds tale re-imagines the Dark Knight detective in Victorian times and pits him against the infamous murderer Jack the Ripper.