"You'll never guess who they got to replace you at work."

The sentence above is one of dialogue in the series "Big bang theory". I can guess the meaning is that you will never guess who will work instead of you. But I want to know what's the meaning of 'got to'. And what does 'they' indicate?

I think the following sentence is correct grammatically. You'll never guess who will replace you at work.

You'll never guess who they got to replace you at work.

The sentence above is from the dialogue in the series The Big Bang Theory. I can guess the meaning is that you will never guess who will work instead of you. But I want to know what's the meaning of 'got to'. And what does 'they' indicate?

I think the following sentence is correct grammatically.

You'll never guess who will replace you at work.

"You'll never guess who they got to replace you at work."

The sentence above is one of dialogue in the series "Big bang theory". I can guess the meaning is that you will never guess who will work instead of you. But I want to know what's the meaning of got to. And what does they indicate.

I think the following sentence is correct grammatically. You'll never guess who will replace you at work.

"You'll never guess who they got to replace you at work."

The sentence above is one of dialogue in the series "Big bang theory". I can guess the meaning is that you will never guess who will work instead of you. But I want to know what's the meaning of 'got to'. And what does 'they' indicate?

I think the following sentence is correct grammatically. You'll never guess who will replace you at work.