Noah in rabbinic literature "Sefer haYashar" describes another method for distinguishing them: the clean animals and fowls crouched before Noah, while the unclean ones remained standing. A difference of opinion concerning Noah prevails also with regard to his entering into the ark. According to some rabbis, Noah's faith was so small that he did not enter the ark until he stood ankle deep in water (Genesis Rabba xxxii. 9); others declare, on the contrary, that Noah waited for God's directions to enter the ark, just as he awaited His permission to leave it (ib. 34.4; Midrash Agadat Bereshit, in Jellinek, "B. H." iv. 11).
The Ark in Space was treated as a single six-part story to save money; "The Ark in Space" was filmed entirely in-studio, while "The Sontaran Experiment" was filmed entirely on location. "The Ark in Space" is the first broadcast story from Hinchcliffe as producer. Hinchcliffe believed that in order to expand the show's core audience, it was necessary to broaden the show's appeal to adults, and "Ark in Space" demonstrates this with its use of horror, particularly the inexorable transformation of Noah into an alien creature. A scene in which the half-transformed Noah begs Vira to kill him was deemed too scary for children