Although many viewers may recognize the first verse of "Morning Has Broken," sung by the prisoners in the opening scene in the Colonies where Janine and Emily are being held, as the 1972 hit single by Cat Stevens (aka Yusuf Islam), it is actually a Christian hymn with lyrics composed by Eleanor Farjeon in 1931 and set to the tune of a traditional Scottish Gaelic song, "Bunessan." It is often sung at children's services and for funerals. The Cat Stevens version included instrumental passages by classically trained keyboardist Rick Wakeman, who shortly thereafter joined the progressive rock band Yes, to lengthen a 45-second hymn to a three-minute pop recording that charted high in the U.S., UK, and other countries.
Near the end of the episode, right after Emily says, "It was a beautiful wedding," the rabbi at the Colonies is heard reciting a portion of the Mourner's Kaddish, the Hebrew prayer chanted at funerals and near the conclusion of every Jewish Shabbat service.