Myles Hippolyte ended Peterhead's cup dream deep into extra time as Livingston's 1-0 win booked them a place in the Petrofac Training Cup semi-finals.Livingston dominated possession in the first half but failed to open the scoring, with Gary Glen arguably having the best opportunities as his right-foot shot curled just beyond the post before a fantastic left-foot strike from inside the area also failed to find the back of the net.The visitors continued their dominance into the second half as David Robertson, Michael McKenna and Glen all had opportunities to put Livingston in front, but squandered their chances.As penalties loomed in the second half of extra time, substitute striker Hippolyte finally broke down the League One side's resilient defence in the 113th minute and beat Graeme Smith.Andrew Rodgers was sent off late on for Peterhead for foul and abusive language as the Championship side progressed to the last four.