In the movie "Apollo 13", which astronaut became ill on the flight?

In the movie "Apollo 13," astronaut Fred Haise became ill during the flight. The film depicts Haise developing a urinary tract infection while the crew struggled to survive after an oxygen-tank explosion crippled the spacecraft.

Haise was the lunar module pilot, flying alongside mission commander Jim Lovell and command module pilot Jack Swigert. After the explosion, the crew abandoned the planned Moon landing and used the lunar module Aquarius as a lifeboat. Limited water, low temperatures, and cramped conditions made the journey home increasingly dangerous.

The illness was not the cause of the emergency; it was a consequence of the harsh conditions aboard the damaged spacecraft. Bill Paxton portrayed Haise in the 1995 film, with Tom Hanks as Lovell and Kevin Bacon as Swigert. The real Apollo 13 crew safely returned to Earth on April 17, 1970, after a mission lasting nearly six days.