Primeval/Fridge

• Fridge Brilliance - As noted below, Season 1's In Spite of a Nail ending can explain virtually any "inconsistency" in the second season (ie: Abby suddenly knows martial arts and loses interest in Stephen; Connor becomes more reserved but has actually fallen in love with Abby; Stephen's alleged girlfriend Allison is never mentioned again, and neither is Connor's friend Duncan). These changes are even more plausible when you realize that Leek has been keeping creatures from various time periods and they're never sent back, which means the present is still being altered.
  • In Season 4, Duncan features once as the civilian of the week.
• Fridge Horror - Emily's original fate. In 5x02, Abby gives Matt a newspaper article that tells him what happened to Emily once she went back to her own time: her husband had her institutionalized for the rest of her life. The condition of 1800s psychiatric hospitals are questionable at best. She probably did not live a happy or healthy life in her own time, but fortunately she comes back to the present when Matt goes to 1868 in 5x03, erasing that timeline.