Sci-fi Mars Rescue Movie Title

Hello.

The movie I am looking for involves a crew of astronauts returning to what I believe is Mars. They are there to rescue a crew member who unbeknownst to them has faked all his data on the planet being made somewhat habitable. He lures one of the crew members out far away from the base and tries to kill him. It's at this time they discover he's been lying to them. I don't remember if he succeeds or not in killing the crew member. 

Let me know if you have any ideas.