The IMDB Rating is a Joke!
Sorry but I just saw the rating of 6.4 for Ice Station Zebra and is a joke! When people rate this movie of 1968 with wich movies they compare it. With the CGI Action Movies of today? For 1968 it is a great action Movie with good Specials Effects for this time. Where Eagles dare (1968) has 7.7 and The Guns of Navarone (1961) has 7.6. Both are great action Movies of their Time and both based on a Story by Alistair McLean. Ok the parts of the Story seems to be similiar to other typical McLean Stories, but that is the way it is. The Story is great and very suspenseful.
The Director John Sturges did a good job (at he did in most of his movies)and all the Actors around Rock Hudson did a good job too. In my eyes is Ice Station Zebra very underrated today and the IMDB ranking should be also between 7 and 8.