Hated in the Nation

When deciding the order in which the third season would air, Charlie Brooker was explicitly told by Netflix this episode could not be the season premiere, since its extended length would discourage viewers from watching the next installment right away.

MRI magnetic fields are generally left on at all times. It can take up to 30 minutes for the field to dissipate. If the field was strong enough to pull out the mechanical bee, it would still be too strong soon after for someone to just pull it off of the MRI.

However, in case of emergency (such as as a small metallic object being inadvertently removed from a patients skull) there is the option to "quench" an MRI, which shuts down the magnetic field almost instantly. It works by rapidly releasing the liquid helium in gaseous form. In order to be used again, the liquid helium inside the scanner has to be refilled, making a quench an expensive procedure.

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