It has already been announced that Ruby Sunday, played by Mollie Gibson, in the Doctor Who season that will start to be streamed on May 11th on the BBC iPlayer and Disney+ will be leaving the series before the end of the second season, therefore how many time during the first season will Ruby Sunday die?

A death is classed as Ruby being physically killed whether the Doctor reverses that death or not (cf Rory Williams)

This question will resolve at the end of transmission of the first season on BBC One (linear)