India-Canada row: Ottawa suspects New Delhi in killing of Sikh separatist

Read more Canada expels Indian diplomat amid probe into exiled Sikh leader's murder

Could the government of PM Narendra Modi really have ordered an extraterritorial assassination? India is not the only superpower Canada is watching. China has recently been accused of pushing expatriates to oppose pro-democracy lawmakers and Ottawa is always on the lookout for Russian interference.

Beyond just Canada, how do diasporas weigh on politics in their countries of origin and how do those countries impact where they live?

Produced by Charles Wente, Juliette Laurain and Imen Mellaz.

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