в самый последний момент(I reached the airport in the nick of time and made my flight. Val_Ships); без промедления(A man walking his dog saw her fall into the river and pulled her out just in the nick of time. Val_Ships); именно в нужный момент(just in time, as in "The doctor arrived in the nick of time and the patient's life was saved. Val_Ships); весьма кстати(The doctor arrived in the nick of time and the patient's life was saved. Val_Ships)