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From the airport:take the underground/metro line 8 to Nuevos Ministerios. Then take the commuter train (Cercanías) line C10 to Villalba and get off at Torrelodones station.
From the AVE:from Atocha station take the commuter train line(Cercanias) C10 to Villalba and get off at Torrelodones station.
From the centre of Madrid:the quickest way is to take the underground/metro line 1 to Atocha Renfe and then take the commuter train (Cercanias) line C10 to Villalba and get off at Torrelodones station.