From Wikipedia:
Bernardo committed multiple sexual assaults, escalating in viciousness, in and around Scarborough. He attacked most of his victims after stalking them as they got off buses late in the evening.
Known incidents are:
May 4, 1987: Rape of a 21-year-old Scarborough woman in front of her parents' house, after Bernardo followed her home
May 14, 1987: Rape of a 19-year-old woman in the backyard of her parents' house
July 17, 1987: Attempted rape of a young woman. Although he beat the victim, he abandoned the attack when she fought back
September 29, 1987: Attempted rape of a 15-year-old girl. Bernardo broke into a house in Scarborough and entered the victim's bedroom. He jumped on her back, put his hand over her mouth, threatened her with a knife, bruised the side of her face and bit her ear. Bernardo fled when the victim's mother entered the room and screamed. Nineteen-years-old at the time of the crime, Anthony Hanemaayer was convicted of the sexual assault in 1989 and served a sixteen-month prison sentence, but was exonerated after Bernardo admitted to the crime in 2006.
December 16, 1987: Rape of a 15-year-old girl. The next day Metropolitan Toronto Police issued a warning to women in Scarborough traveling alone at night, especially those riding buses.
December 23, 1987: Rape of a 17-year-old girl with a knife he used to threaten his victims. At this point, he began to be known as the Scarborough Rapist.
April 18, 1988: Bernardo attacked a 17-year-old girl
May 25, 1988: Bernardo was nearly caught by a uniformed Metro Toronto investigator staking out a bus shelter. Although the investigator noticed Bernardo hiding under a tree and pursued him on foot, Bernardo escaped.
May 30, 1988: Rape of an 18-year-old woman in Mississauga, Ontario, about 40 kilometres (25 miles) southwest of Scarborough
October 4, 1988: Attempted rape in Scarborough. Although his intended victim fought him off, he inflicted two stab wounds to her thigh and buttock which required 12 stitches.
November 16, 1988: Rape of an 18-year-old woman in the backyard of her parents' house
November 17, 1988: Metro Police formed a task force to capture the Scarborough Rapist
December 27, 1988: Attempted rape, with a neighbour chasing Bernardo off
June 20, 1989: Attempted rape; the young woman fought, and her screams alerted neighbours. Bernardo fled with scratches on his face.
August 15, 1989: Rape of a 22-year-old woman
November 21, 1989: Rape of a 15-year-old girl Bernardo saw in a bus shelter
December 22, 1989: Rape of a 19-year-old woman
May 26, 1990: Rape of a 19-year-old woman. His victim's vivid recollection of her attacker enabled police to create a computer composite portrait, which was released two days later by police and published in Toronto and area newspapers.
July 1990: Two months after police received tips that Bernardo resembled the Scarborough Rapist composite, he was interviewed by two police detectives