 FAIR: "Houston, we have a problem," is probably the worlds most  known misquote. After the bang, the conversation was as follows.  Swigert: "Okay, Houston, weve had a problem here." Jack Lousma:  "This is Houston. Say again please." Lovell: "Houston, weve had a  problem. Weve had a main B bus undervolt." However, this was a  deliberate change suggested by Tom Hanks to better convey the sense  of urgency in the scene.