"Doctor Who: Extra Terrestrials – Bosses' SOS for Daleks Daily Star 15 September 2015 "BBC One Trailer – Sneak Peek of Episode 1, Series 9".
Erişim tarihi: 25 Eylül 2015.  ^ "Doctor Who: Extra Terrestrials - Bosses' SOS for Daleks Daily Star 15 Eylül 2015 ^ "BBC One - Doctor Who, BBC One Trailer - Sneak Peek of Episode 1, Series 9".