TARP is a classic 1950's Sci-Fi adventure with touches of horror. Gerald Mohr is the unlikely captain of the spaceship in all his male chauvinist pig glory. The way he treats his femme-fatale subordinate Iris would land him a sexual harassment lawsuit in our day and age. Nora Hayden is delightful as Iris. She is the emotional center of the film and gives TARP it's much needed heart and soul. The other two astronauts are fine as well but are definitely peripheral characters.
TARP is a bit wordy at times, filled with lots of techno-babble. But that was common in Sci-Fi films of that era. The ultra red color filter used during the scenes where the crew is on the planet Mars is effective and serves to counteract the terrible monster effects that are right up there with the best of Ed Wood. Yet, these monsters fall into the "they're so bad they're good" category and are worth a few laughs at the very least.
Give this one a chance. It's not Forbidden Planet (1956) but its better than it probably has a right to be.
For more info check out the film's entry in IMDB.