Castor and Pollux horse breaker and the boxer / Polydeuces, my brothers" ..." – Helen, "Iliad" 3.253–255), but in the "Odyssey" they are treated as alive even though "the corn-bearing earth holds them". The author describes them as "having honour equal to gods", living on alternate days because of the intervention of Zeus. In both the "Odyssey" and in Hesiod, they are described as the sons of Tyndareus and Leda. In Pindar, Pollux is the son of Zeus while Castor is the son of the mortal Tyndareus. The theme of ambiguous parentage is not unique to Castor and Pollux; similar characterisations appear in
Leda and the Swan clones, often together in the same scene. The television show spawned a comic book series which appeared in 2015. In April 2012 an art gallery in London, England, was instructed by the police to remove a modern exhibit of Leda and the Swan. The law concerned was Section 63 of the Criminal Justice and Immigration Act 2008, brought in by the Labour Party government of 2005–2010. Leda and the Swan Leda and the Swan is a story and subject in art from Greek mythology in which the god Zeus, in the form of a swan, seduces the mortal woman Leda.