Police appealing for witnesses after a road traffic collision on Bryn Deri, Ebbw Vale.
It happened at around 6.40pm on Sunday 17 November.
Officers attended, along with personnel from the Welsh Ambulance Service and Welsh Air Ambulance.
The collision involved a black Ford Fiesta and a pedestrian.
The pedestrian, a 33-year-old man from Tredegar was taken to hospital where he remains in a critical condition. His next of kin have been informed.
Anyone with information, including dashcam or CCTV footage, is asked to get in touch with Gwent Police quoting 2400383439.
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