Genetic Memory

I just got finished watching a "marathon" of x-files reruns and the last episode had to do with a murderer who resurfaced after 50 years. Who it really turned out to be was the murderer's granddaughter who recently found out that she was pregnant and had been acting out through her genetic memory. I personally don't believe in such a thing. Through my biology knowledge I see it more as an "instinctual" behavior with certain genes coding for those "instincts". Now that sounds almost like the same thing. Maybe I'm just giving a lot of bull...well it is 3am and I can finally go to bed now. I don't get why I torture myself so.