ɔːlðˈoʊ ɪɾ ɪz nˈɛvɚɹ ɛkspɹˈɛsli aɪdˈɛntᵻfˌaɪd, vˈɛɹiəs klˈuːz sədʒˈɛst ðætðɪ ˈɛnɚdʒi bˌiːɪŋ ðə dˈɑːktɚ ænd hɪz ˈælaɪz fˈeɪsd hˈɪɹ wʌzðə mˈændɹɐɡˌoːɹə hˈiːlɪks, wˌɪtʃ fˈɔːt ðə fˈoːɹθ dˈɑːktɚɹ ɪnðə fˈɪftiːnθ sˈɛntʃɚɹi ɪnðə mˈæsk ʌv mˈændɹɐɡˌoːɹə; ðə tˈɛnθ dˈɑːktɚ kənfˈɜːmd ɪts pɹˈɛzəns hˈɪɹ wɛn hiː fˈeɪsd mˈændɹɐɡˌoːɹə ɐɡˈɛn ɪnðə nˈuː sˈɪɹiz ɐdvˈɛntʃɚz nˈɑːvəl bjˈuːɾifəl kˈeɪɑːs.
Although it is never expressly identified, various clues suggest that the energy being the Doctor and his allies faced here was the Mandragora Helix, which fought the Fourth Doctor in the fifteenth century in The Masque of Mandragora; the Tenth Doctor confirmed its presence here when he faced Mandragora again in the New Series Adventures novel Beautiful Chaos.