A car accident inexplicably sends three people, a woman and her two 'wooers', one a erudite toff, the other a practical everyman, back 50,000 years to Neanderthal times. No explanation for the temporal displacement is offered and the story is more of a parable about 'thinkers vs doers' than a time-travel adventure. The story was adapted by Arch Oboler, who wrote/adapted several science fiction films in the 1950s (including 'Five' (1951) and 'The Twonky' (1953)). Some effort was put into the script, which is fairly accurate and scientifically literate (including references to Mousterian culture) and the story gets quite brutal at times. Not a lot happens and the plot is weakened buy the sudden appearance of a gun (which could have been written in more smoothly). The final 'twist' is predictable and awkwardly wedged in. It's interesting to speculate to whom 'Adam' in the title refers, otherwise the old teleplay has little to recommend it.