"Ghostbusters I & II" are two immensely successful comedy/science-fiction films starring Bill Murray, Dan Aykroyd, Harold Ramis, Sigourney Weaver, and Rick Moranis as a team of ghost specialists and victims. Dr. Venkman (Murray) and his team of paranormal professors comically battle Gozer, a strange Sumerian entity. In the sequel, our team returns to duke it out with Slimer, a green, egg-shaped creature. Rather than scary, Slimer is more of a pest who laughs at everything he does.