The crew had just completed a television broadcast and was inspecting Aquarius, the Landing Module (LM). The next day, Apollo 13 was to enter the moon's orbit, and soon after, Lovell and Haise would become the fifth and sixth men to walk on the moon. At 9:08 p.m., these plans were shattered when an explosion rocked the spacecraft. Oxygen tank No. 2 had blown up, disabling the normal supply of oxygen, electricity, light, and water. Lovell reported to mission control: "Houston, we've had a problem here," and the crew scrambled to find out what had happened. Several minutes later, Lovell looked out of the left-hand window and saw that the spacecraft was venting a gas, which turned out to be the Command Module's (CM) oxygen. The landing mission was aborted.

As the CM lost pressure, its fuel cells also died, and one hour after the explosion mission control instructed the crew to move to the LM, which had sufficient oxygen, and use it as a lifeboat. The CM was shut down but would have to be brought back on-line for Earth reentry. The LM was designed to ferry astronauts from the orbiting CM to the moon's surface and back again; its power supply was meant to support two people for 45 hours. If the crew of Apollo 13 were to make it back to Earth alive, the LM would have to support three men for at least 90 hours and successfully navigate more than 200,000 miles of space. The crew and mission control faced a formidable task.

To complete its long journey, the LM needed energy and cooling water. Both were to be conserved at the cost of the crew, who went on one-fifth water rations and would later endure cabin temperatures that hovered a few degrees above freezing. Removal of carbon dioxide was also a problem, because the square lithium hydroxide canisters from the CM were not compatible with the round openings in the LM environmental system. Mission control built an impromptu adapter out of materials known to be onboard, and the crew successfully copied their model

.....and then Tom Hanks stepped out of the capsule after saving the
      day!!!

It's hard to believe that people really think we went to the moon! 

I remember waiting those long minutes waiting to hear from the capsule after the radio black-out that went longer than planned and we thought all were lost...  frightening.

Best line was Mrs. Lovell when asked if the media could erect antennas on her front lawn.  "You'll have to ask my husband.  He will be home Tuesday."