What's So Bad About Feeling Good? (1968)
A new infection that simply makes people feel happy is treated as a threat by the authorities while its "victims" work to spread it to others.
Directed by: George Seaton
Starring: George Peppard, Mary Tyler Moore, Dom DeLuise, John McMartin, Nathaniel Frey, Charles Lane
Links: IMDb, Movie posters, Movie stills
