Bill Mumy is a versatile American actor, musician, and producer who began his career as a prolific child actor in the 1960s. He is most famously known for his roles as Will Robinson in the classic sci-fi series 'Lost in Space' and as the menacing Anthony Fremont in the iconic 'Twilight Zone' episode 'It's a Good Life'. As an adult, he continued acting with a notable role as Lennier in the acclaimed series 'Babylon 5'. Beyond acting, Mumy is an accomplished musician, often collaborating with Robert Haimer as the duo Barnes & Barnes, famous for the novelty song 'Fish Heads'.