'Beachhead' is a pilot episode of classic science-fiction series 'The Invaders'. Not the best episode of the series, but it beautifully builds up the tension and mood for the rest of the series. Paranoid, sometimes claustrophobic atmosphere that creates the sense that anyone can be the enemy.
When architect David Vincent (Roy Thinnes) is too tired to drive on he takes a rest near closed down roadside diner. In the middle of the night he witnesses the landing of space ship. Nobody believes his story, but Vincent is relentless enough to make the police investigate the landing site. With no evidence found, his story is not taken seriously. Vincent starts to dig deeper himself and discovers that aliens can take human form.
Good episode that keeps viewer interested and curious enough to go and see the following episodes. As 'The Invaders' is TV show from the '60s one can't expect the special effects stand out much, but they are good enough to not laugh at them. The writing is good, story interesting and acting superb.