Zak McKracken and the Alien Mindbenders

The plot follows Zak (full name Francis Zachary McKracken), a writer for the National Inquisitor, a tabloid newspaper; Annie Larris, a freelance scientist; and Melissa China and Leslie Bennett, two Yale University coed students, in their attempt to prevent the nefarious alien Caponians (who have infiltrated the phone company) from slowly reducing the intelligence of everybody on Earth using a 60 Hz "hum".