|This article is about the magazine story. You may be looking for the Railway Series story.|
- "Make sure that you don't peek!"
"But I will, for Duncan cannot see me as I'm right behind your back!"
- ―Duncan, Mighty, and Mac
Smokescreen is a magazine story.
Mighty Mac and Duncan are playing hide and seek. Duncan does not think that Mighty Mac is playing fair because one of them is always peeking. Duncan has an idea and blows thick smoke over Mighty Mac and quickly goes to hide in a tunnel, but his smoke makes him cough and he has to come out. Then, the two engines agree to play fair.
- In the last illustration, Duncan can be coloured in.