Giorgio A. Tsoukalos

Giorgio A. Tsoukalos is a Swiss-born writer, ufologist, television presenter and producer. He is a proponent of the pseudo-archaeological theory that ancient alien astronauts interacted with ancient humans. He is best known for his appearances on the television series Ancient Aliens. Tsoukalos also hosted the H2 series In Search of Aliens, which ran for one season in 2014. In 2021 he appeared as himself on the television series Resident Alien.