The Tracy Brothers Meet the Thunderbots

This is how the Tracy Brothers meet the Thunderbots in Thunderbots Are Go.

[we view Optimus Prime and the Tracy Brother in a corridoor, walking side by side. Prime turns to them]

Optimus Prime: So, you five are operators of Thunderbirds 1, 2, 3, 4 and 5?

Virgil Tracy: You bet ya.

Optimus: Well, we have a little surprise for you. [steps back to reveal the Thunderbirds, now all robots]

Gordon Tracy: Whoa!

Optimus: Tracy Brothers, I want you to meet the Thunderbots.