ɪɾ ɪz ɐ pɹˈiːkwəl tə ðə tˈɛlᵻvˌɪʒən sˈɪɹiəl ðə bɹˈeɪn ʌv mˈɔːɹbɪəs fɹʌm mˈɔːɹbɪəs ænd sˈɑːlɑːn ænd ðə sˈɪstɚhˌʊd ʌvðə flˈeɪmz pɚspˈɛktɪv, ɔːlðˈoʊ ɪɾ ɪz tˈɛknɪkli ˈɔːlsoʊ ɐ sˈiːkwəl æz ðə fˈɪfθ dˈɑːktɚɹ ɪz ðə mˈeɪn kˈæɹɪktɚ wˌaɪl ðə bɹˈeɪn ʌv mˈɔːɹbɪəs fˈiːtʃɚd ðə fˈoːɹθ æz ðə sˈɛntɹəl pɹˈoʊɾɐɡənˌɪst.
It is a prequel to the television serial The Brain of Morbius from Morbius and Solon and the Sisterhood of the Flame's perspective, although it is technically also a sequel as the Fifth Doctor is the main character while The Brain of Morbius featured the Fourth as the central protagonist.