A Stitch in Time may refer to:
"Stitch in Time" is an episode of The Outer Limits. It first aired on 14 January 1996, and was the first episode of the second season.
FBI agent Jamie Pratt investigates a series of murders spanning a period of forty years — all committed with the same gun. The gun is traced to Dr. Theresa Givens, a former employee at a top-secret government project. Mysteriously, Givens was only five years old at the time of the first murder, and the gun had not even been manufactured.
As it turns out, Dr. Givens has used a property of developing fetal human brains to create a time machine and has been traveling back through time to kill condemned serial killers before they strike, all to prepare herself (mentally) for one final journey to stop the man who had kidnapped and raped her for five days when she was a teenager, the event having left her mentally scarred all her life.
Another angle of the episode is the rapidly deteriorating physical health of Dr. Givens. Already mentally scarred from the start from the trauma of her youth, Dr. Givens's physical health declines through the episode. FBI agent Jamie Pratt finally uncovers the truth and Givens eventually discloses to Agent Pratt that an unfortunate side-effect of altering time for the time traveler is the sudden merging of two completely different time streams into the brain at once upon return which, over time, has a visible physical impact (causing nosebleeds) and presumably will become fatal given enough occurrences.