בערב אנחנו רואים עוד פרק מהסדרה, כי העלילה שלה נעשית טובה יותר מפרק לפרק.

בערב means in the evening. Hebrew often puts time expressions at the beginning of the sentence, especially to set the scene.

So:

בערב אנחנו רואים עוד פרק...
= In the evening, we watch another episode...

This word order is very natural in Hebrew. You could also say אנחנו רואים עוד פרק בערב, but starting with בערב gives the time more emphasis.

אנחנו רואים is the present tense, literally we see / we are seeing / we watch.

In Hebrew, the present tense is often used for:

• habits or routines
• general statements
• sometimes even near-future events in everyday speech

Here it most naturally sounds like a habit or repeated action:
In the evening, we watch another episode...

If you wanted to stress a one-time future action, נראה (we will watch) would also be possible in the right context, but אנחנו רואים is very natural for a routine.

Because את is only used before a definite direct object.

Here, עוד פרק means another episode or one more episode, which is indefinite. So there is no את.

Compare:

• אנחנו רואים עוד פרק = we watch another episode
• אנחנו רואים את הפרק הבא = we watch the next episode

In the second sentence, הפרק הבא is definite, so את is required.

Here עוד means another, one more, or an additional.

So:

עוד פרק = another episode / one more episode

This is a very common Hebrew use of עוד before a noun.

It does not mean still here.
For example:

• אני עוד מחכה = I am still waiting
• עוד פרק = another episode

Same word, different use.

Because Hebrew often uses מ־ in places where English uses of.

So:

• פרק מהסדרה = an episode of the series
• literally: an episode from the series

This sounds completely normal in Hebrew. The idea is that the episode is taken from out of the series.

Also note the form:

• הסדרה = the series
• מ־ + הסדרה = מהסדרה

Because the definiteness of פרק and הסדרה is separate.

• פרק = an episode
• הסדרה = the series

So עוד פרק מהסדרה means:

another episode from the series

This is perfectly normal: the episode is indefinite, but the series is definite.

English does the same thing:

• an episode of the series
• a student from the school

שלה means her / hers / its, depending on context. Here it means its and refers to הסדרה.

So:

• העלילה שלה = its plot / the plot of it
• in context: the plot of the series

Since סדרה is a grammatically feminine noun, the possessive pronoun is שלה.

Hebrew uses grammatical gender even for things, so English its may become Hebrew שלו or שלה, depending on whether the noun is masculine or feminine.

Yes. Both are possible, but they feel a little different.

• העלילה שלה = its plot, the plot of it
  
  • very natural and common in everyday speech
• עלילת הסדרה = the plot of the series
  
  • a bit more compact and often a bit more formal
• עלילתה = its plot
  
  • correct, but more literary or formal

So the sentence uses a very natural spoken-style structure.

Because they agree with העלילה, and עלילה is a feminine singular noun.

So Hebrew makes both the verb form and the adjective match:

• העלילה = feminine singular
• נעשית = feminine singular
• טובה = feminine singular

If the subject were masculine, the forms would change. For example:

• הסיפור נעשה טוב יותר = the story becomes better

Here נעשית means becomes or is becoming.

So:

העלילה שלה נעשית טובה יותר
= its plot becomes better
or
= its plot is getting better

This is a normal Hebrew way to express change of state.

You may also hear other verbs in similar sentences, such as:

• הופכת להיות טובה יותר
• נהיית טובה יותר

But נעשית טובה יותר is fully correct and natural, especially in slightly more careful or written Hebrew.

Hebrew often forms the comparative with יותר, meaning more.

So:

• טובה = good
• טובה יותר = better
• literally: more good

This is the standard Hebrew way to make comparisons.

You may also hear יותר טובה in speech. Both occur, but טובה יותר sounds a bit neater and more standard in a sentence like this.

מפרק לפרק means from episode to episode, or more naturally in English:

• with each episode
• episode by episode

It describes gradual change over time.

This is a common Hebrew pattern:

• מיום ליום = from day to day
• משנה לשנה = from year to year
• מפרק לפרק = from episode to episode

So the idea is that the plot keeps improving as the episodes go on.