Doctor Who has plenty of poetic licence in its remit, thanks to all that timey-wimey, wibbly-wobbly stuff, so there's every chance Ingrid Oliver's dreams of a series comeback can still come true.

It's June 10, 2015 and Ingrid Oliver has just spent five weeks in Cardiff filming Doctor Who. The 'Zygon Invasion' / 'Zygon Inversion' double-bill marks only her third appearance as affable Petronella ...

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