Firefighters were called to the incident on Main Road at 9.07pm on November 21.
A woman and a man were taken to hospital by London Ambulance Service.
A second man was treated at the scene.
Two fire engines and a Fire Rescue Unit from Sidcup, Eltham, and Bexley fire stations attended the scene.
A spokesperson for the London Fire Brigade said: “Firefighters responded to a road traffic collision on Main Road in Sidcup.
“Three cars and a motorcycle were in collision.
“One woman was rescued from a vehicle.
“The woman and one man were taken to hospital by London Ambulance Service.
“A second man was treated on scene.
“ The Brigade was called at 2107 (21/11) and two fire engines and a Fire Rescue Unit from Sidcup, Eltham and Bexley fire stations attended the scene.”
