This is how Hunter meets Starscream goes in The Great Deceptitrain Battle.
[Hunter walks along the road]
Hunter: Con found it. That Thomas is messing up my plans.
Starscream: [off-screen] I know how you feel, Hunter and I can help with something.
Hunter: Huh? Who said that?
[Starscream steps out of the shadows]
Starscream: I did, Hunter. Plus, I know how you feel.
Hunter: Who are you?
Starscream: I'm Starscream. Megatron's second in command. And you must be Hunter.
Hunter: Yes. That's me. And a certain Train-Prime is always in the way of my plans.
Starscream: You mean OpThomas Prime?
Starscream: The Cyberlings are gone to the good side by the Prime-prince of Friendship.