On New Year's Eve a drunken Christine tumbles into her flat with handsome party pick-up Adam. They begin dating and eventually marry, having a son Jack, but Christine is repeatedly troubled by disturbing thoughts and images. After a few years she and Adam divorce but she still keeps seeing figures from the past, which puzzles her. Eventually all the images come together to make sense though they do not necessarily make for a happy ending.
This episode contains examples of:
- 13 Is Unlucky: The various events we see in Christine's life are 13 months apart, so we follow her through 13 years. And, despite the episode's title, we see a 13th day in Christine's life, which is also the last.
- Alliterative Name: Christine Clarke.
- Asian and Nerdy / Emotionless Girl: The Asian flatmate Fung is not very social and fully immersed in her studies.
- Career Versus Man: Referenced when Marion dismisses Christine's wish to focus on her career rather than marrying Adam.
- Cathartic Exhalation: In the nightmare sequence, when Christine is in the kitchen and opens the pantry door. There is nothing behind it so she exhales loudly.
- Children Are Innocent: Jack.
- Daddy's Girl: Christine is one for Ernie.
- Daydream Surprise: Ultimately subverted. The scene with the smashed eggs turns out to be a nightmare when Christine wakes from it via Catapult Nightmare. In the end, however, this is revealed to be part of a bigger Dying Dream.
- Double Entendre:
- "Insert rod into top pole until base connects."
- Adam mentioning that Zara just started under him.
- Dying Dream: The entire episode is a collage of past memories and pieces of Christine's present moment awareness flashing before her eyes as she is drifting out of consciousness due to the fatal head wound received in a car crash.
- Epileptic Flashing Lights: The kitchen light flickers menacingly in Christine's nightmare.
- Foreshadowing: Plenty of this throughout the episode, such as ambulance sirens cutting through the soundtrack; blue lights flashing on the Christmas tree; the smashed eggs from Christine's groceries; the 'ding ding ding' sound effect during scene transitions (indicating the alarm when a car door has been left open too long) or Jack's toy cars piled up to resemble a crash with emergency vehicles present.
- Gay Best Friend: Bobby for Christine.
- Genre Shift: The only episode of the show thus far that is straight drama rather than Black Comedy.
- Girls Love Stuffed Animals: Gender-inverted. Adam struggles to close a suitcase filled with Jack's soft toys. Christine insists these come along for the holiday because her son cannot sleep without them.
- Hair of Gold, Heart of Gold: Christine has this.
- Horror Doesn't Settle for Simple Tuesday: All the mysterious events in Christine's life take place on holidays or other memorable days.
- Innocent Innuendo: The dialog in the opening scene when they try to unlock the door while drunk.Christine: Come on, put it in!Adam: I can't. I can't! I can't do it.Christine: Don't, you're dropping me!
- Lighter and Softer: For the show in general, in that it aims for a kind of melancholy grace rather than Karmic Twist Ending or Cruel Twist Ending.
- My Life Flashed Before My Eyes
- Naughty Nuns: Christine is dressed as one when she meets Adam.
- Raincoat of Horror: The strange, seemingly sinister man who keeps appearing to Christine is wearing a raincoat.
- Roses Are Red, Violets Are Blue...: Christine receives a Valentine's Day card from her first boyfriend with such a line.
- Round Hippie Shades: The opening scene has Adam mistake somebody dressed up as John Lennon for Harry Potter because of the misapplied Iconic Outfit.
- Rule of Symbolism: Jack dressed as an angel.
- Spit Take: Downplayed. Christine spits her coffee when her mother mentions the topic of marriage in Adam's presence.
- Time Skip: The story has many time skips of months and later years ahead.
- Titled After the Song: The episode title is a play on the Christmal carol "The Twelve Days of Christmas
". - Valentine's Day Violence: The Valentine's Day section shows Christine getting a Valentine from her first boyfriend, from primary school, who died when he was young, which begins a series of strange and unsettling events when he seems to be stalking her. However, this is all a Red Herring - he's actually a personification of Christine's death coming towards her.
