Strellin was a planet which was known for its "peaceful tranquility". Humans developed on Strellin and established a grade 3 civilisation. The Brotherhood of the Black Petal lived in a mountainous region of the planet. The planet was home to the last of the Ostrecallis Mediosai.

A Black Dalek and several Daleks of the Emperor's Personal Guard crashed on Strellin and were found by the Brotherhood of the Black Petal. (AUDIO: Order of the Daleks)

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