 Of particular note being its own science fiction anthology series "Out of the Unknown" (1965–71), which ran for four seasons.Some of the ITV companies were imitating American styles of production, shooting some of their series on film rather than in the multi-camera electronic studio for lucrative sales in the 'international' market.One producer who was keen to make science fiction for the commercial network was Gerry Anderson, who initially used puppets for his shows.