Who?

Looking rather better on TV than on the big screen, where its rough edges show up more, this is a very passable adaptation of a fine sci-fi/espionage novel by Algis Budrys. The basic premise is vividly laid out as an American scientist (Bova), injured in a car crash on the Russian border, is returned to the West after advanced medical treatment which has him looking like a Martian invader with a prosthetic metal head. Thereafter the script develops cold feet, and obscures its detective theme - is this the same man, and can he be safely returned to his secret research? - by making tiresome concessions to action adventure (routine car chase and so forth).