I liked to think that the sister was held hostage by the fairies that were in that Torchwood episode. It makes no sense, but whatever.
I read Digital Spy and their forums have mixed opinions on DW this series. That said this last episode wasn't as popular...
Doctorwhotv.co.uk has a weekly poll on each episode out of 10...(this doesn't include this week's episode) & isn't for spoiler avoiders...
Listen – 8.918
Flatline – 8.774
Mummy on the Orient Express - 8.679
Deep Breath – 8.282
Into the Dalek – 8.052
Time Heist - 7.823
Kill the Moon – 7.808
The Caretaker - 7.795
Robot of Sherwood – 7.512
Link to UK ratings etc...
http://www.doctorwhotv.co.uk/doctor-who ... -66394.htm
Deep Breath 6.8m (overnight) 9.17m (final) 10.76m (L+7) AI 82
Into the Dalek 5.2m (overnight) 7.29m (final) 8.26m (L+7) AI 84
Robot of Sherwood 5.2m (overnight) 7.28m (final) 8.25m (L+7) AI 82
Listen 4.8m (overnight) 7.01m (final) 7.80m (L+7) AI 82
Time Heist 4.93m (overnight) 6.99m (final) AI 84
The Caretaker 4.89m (overnight) 6.82m (final) AI 83
Kill the Moon 4.81m (overnight) 6.91m (final) AI 82
Mummy on the Orient Express 5.08m (overnight) 7.11m (final) AI 85
Flatline 4.6m (overnight) 6.71m (final) AI 85
In the Forest of the Night 5.03m (overnight) TBCm (final) AI 83
(iPlayer figures are not included in the ‘final’ figure)
(Live Plus 7 (L+7) counts those who watched live and all repeats, including iPlayer, within seven days following broadcast.)
(The Audience Appreciation Index (AI) is a score out of 100 which is used as an indicator of the public’s appreciation for a show.)