Your post is generally well-written, but I found a few areas that could be improved:

Mistakes & Issues:

1. Grammar & Clarity Issues:

   • "Having travelled back in time (just a couple of weeks), there are 2 Alec's battling it out."

     • Correction: Having traveled back in time (just a couple of weeks), there are two Alecs battling it out.
     • Reason: "Alec's" is incorrect; the plural of "Alec" is "Alecs."

   • "Only to later discover that the original Kiera was shot dead."

     • Correction: She later discovers that the original Kiera was shot dead.
     • Reason: The sentence is incomplete and needs a subject.

   • "Her attitude towards the terrorist time travellers softens and in some episodes, she even teams up with her old foes."

     • Correction: Her attitude towards the terrorist time travelers softens, and in some episodes, she even teams up with her old foes.
     • Reason: A comma is needed before "and" to separate two independent clauses.

2. Lack of Context:

   • "Something happened... so I'm awaiting season 4."
     • This sentence is vague. What exactly happened? A more precise explanation would make this stronger.

3. Inconsistent Spelling:

   • "time travellers" vs. "time travelers"
     • Be consistent. Either use British English (travellers) or American English (travelers), but not both.

4. Awkward Wording:

   • "I'll defer my rating until I've watched Season 4!"
     • Could be clearer: I'll hold off on rating the show until I've finished Season 4!