Der Marsianer: Rettet Mark Watney

Rich Purnell slips and falls after he finds a way to rescue Mark Watney and tells his boss "I need more coffee." Donald Glover revealed in an interview that he slipped for real and just got up and continued to act, and the footage was retained in the final edits for the movie.

Due to Mars' low atmospheric pressure, the effective wind pressure in martian wind storms is much lower than shown in the movie, very unlikely to be sufficient to tip a spacecraft. Also, the wind on Mars is much too weak to carry large rocks. In interviews, Andy Weir has acknowledged this and admitted that he took creative license with this in order to create the story.

The dust on Mars at the surface tends to be very fine, with grain sizes comparable to smoke particles. There are dust storms on Mars, but they look and behave like puffs of smoke instead of raging wind storms depicted in the movie.

Disco music, which had been a running gag throughout the film, is played during the ending credits. Appropriately, the first song played is "I Will Survive," which features the lyric "And so you're back, from outer space."

In June of 2016, an extended cut was released on Blu-Ray and Ultra HD 4K Blu-Ray that adds 10 additional minutes of footage:

• Extended footage of Watney shortly after his abandonment, waking up in the habitat
• Additional moments when Watney charts a course for the rover and dozes off at the wheel, commenting on this to his vlog
• An additional scene after the NASA press conference confirming Watney survived, in which PR Director Annie warns director Vincent Kapoor not to use the phrase "bring him home alive", and also complains about her private life
• Additional moments while Watney and the Pathfinder team communicate, including more repartee between Kapoor and the young JPL technician, and Watney using an unusual insult when he hears his crew have not been told he is alive, followed by the reaction of NASA team members to this
• A short scene after Watney patches the hole in the habitat after the explosion using plastic sheets, in which he uses smoke currents to detect and patch holes with sealant
• Additional scenes showing Rich Purnell requiring the use of a supercomputer to deliver his Earth slingshot calculations
• A scene in which Watney completes the soil analysis started by his crewmates in order to complete their original mission before he leaves Mars
• A scene in which Watney inflates a pressurized tent to eat and clean his body outside the rover on his way to the Ares IV coordinates. He also leaves an apology to the Ares IV team for using their supply drop.
• A short moment in which Commander Lewis and Martinez discuss how many times their simulated rescue mission has resulted in Watney's death

Featured in Ares III: Farewell (2015)