"Fantastic Voyage" (1966)

Preposterous yet diverting, this sci-fi '60s epic has some moments of real tension. The hokey premise: a team of military scientists are shrunk down to mite size and injected into the body of a Russian who knows Big State Secrets. To save him they must find their way to his brain and zap a blood clot before he dies. Oh, and they have just one hour to get in and out. The Oscar winning special effects are a little creaky by today's standards but c'mon, this was 50 years ago. As their 'spaceship' encounters corpuscles and hemoglobin, you feel like you're in a scary lava lamp. And for laughs you get Raquel Welch as one of scientists(!) in a low-cut neoprene spacesuit. What more do you need?