Solar System in fiction close to the Sun and its surface was exposed to extremes of temperature. The asteroids were too tiny and airless. By the early 20th century, prospects for life in the Solar System focused on Venus, the larger moons of Jupiter and Saturn, and especially Mars. With the onset of the Space Age, planetary probes cast increasing doubt on the likelihood of extraterrestrial life in the Solar System, at least life of any magnitude greater than organisms such as bacteria. By the mid-1960s, it was firmly established that life could have no foothold on the hostile surfaces of Mercury or Venus,
Twice as Far guest actress Merritt Wever as Denise Cloyd, who was introduced in the beginning of the sixth season. The character's death is different than in the comic book series. The episode also confirms that Austin Amelio's role is Dwight from the comics. He first appears in "Always Accountable" when he was only known as "D". The episode received mixed reviews from critics. It holds a 59% positive rating with an average score of 7 out of 10 on the review aggregator Rotten Tomatoes. The critics' consensus reads: "'Twice as Far' has a few powerful moments, but overall lacks enough focus or