The orgy of violence ends with him punching an innocent commuter to the ground.
The man can be seen walking down the platform and lashing out at different women before running up and brutally punching an unsuspecting young woman as she listened to music on headphones and looked at her mobile phone.
He hit his last victim so hard that he lost his balance and fell to the ground as she hit the floor.
The last commuter that the man targeted is said to have suffered a perforated eardrum.
Comment: Considering the force and location on the body, she could have been gravely injured, if not killed.
Police are investigating whether the attacker, described locally as a man of North African origin who was a well-known criminal with previous for robbery, was under the influence of drink or drugs.
The sequence of assaults took place yesterday morning at Camp de l'Arpa station on line five of the Barcelona metro.
The station is named after the neighbourhood of the same name in the city's Sant Marti district bordering the Mediterranean.
The regional Mossos d'Esquadra police force are also looking into the possibility that he attacked other women on a tube train before walking along the platform and appearing to randomly slap and push his other female victims.
Comment: There have been numerous video-recorded instances of migrants randomly, violently, and attacking only women.
The man is also said to have insulted commuters who recriminated him over his shocking actions.
At least two Good Samaritans are said to have been assaulted as they tried to chase after him after he targeted the girl with headphones on.
A police spokesman confirmed this morning as they urged other potential victims to come forward.
He said: 'Last night we arrested a man for assaulting several women at the Camp de l'Arpa metro station in Barcelona.
'We are investigating if there are more women who were assaulted.
'If you have been a victim, report it to any police station.'