MBTA Transit Police report officers on patrol at the Central Square Red Line stop yesterday morning spotted a couple making their way onto the platform without paying. Police report this was the third time the male half, Christopher Reed, 26, of Cambridge, has been caught fare evading. He did, however, get a free ride - in the back of a cruiser to T police headquarters - because, police say, he was also wanted on a Cambridge drug charge. The woman? With no outstanding criminal charges, she was captured and released.