Masks
S3, E8: Cole and Railly end up heading back to 19th-century London, in order to find the Witness. The common goal of tracking him down unites the enemies, who were once allies.

S3, E8: Cole and Railly end up heading back to 19th-century London, in order to find the Witness. The common goal of tracking him down unites the enemies, who were once allies.