Mr. Baldwin and his humans were planning how to stop Mr. Bruce, and turn themselves back to normal.

Mr. Baldwin: They won't turn everything back to normal unless they take over our railroad.
Sean: The Eastwood & Mossberg will help us stop the 40 diesels going through Hunterdon.
S.B: Me and Mr. Baldwin will take care of the 40 diesels heading for Mossberg Harbor.
Mr. Baldwin: How can we stop them on our own?
S.B: I have a few ideas. We'll have to be quick.
Mr. Baldwin: I'll do anything to protect my railroad, and my engines. *Looks at the humans* Once we turn Ты back to normal, everything will...

When Jerry's group returned to the roundhouse, they did see Mr. Baldwin, along with Sean, Jazlin, Mily, and Joey. Mr. Baldwin is a blue SD40 with a megaphone sticking out between the front windows.

Mr. Baldwin: Oh good, Ты guys are here as well.
Shayne: What do Ты mean as well?
Mr. Baldwin: It seems that some of the engines went off the island when they were turned into humans.
Sean: *Looking at the group* Wait a second. Where's Jack?
Jesse: Him? He left when Jessica arrived. I don't know what those two are doing.

They were in Eastwood. At the new train station the Eastwood & Mossberg built....