Basil Karlo is a character in the television series Gotham, appearing as a recurring character in season 2 and 3. He is one of the many reanimated subjects brought back from the dead by Hugo Strange at Indian Hill and given shapeshifting abilities.
Much of Basil's early life is unknown prior to his death, although he was an actor who died of unknown means. Following his death his body was brought to the Indian Hill facility underneath Arkham Asylum, and kept along with other deceased subjects.
When Strange began resurrecting subjects, Basil was one of them.