How do I find all 5 Star Trek Captains in Iron Marines?
There are 5 Star Trek captains hidden across Sagan- 1 (World 1) in Iron Marines. You must locate each one and tap them to teleport them back to their ship. You will unlock the "Beam me Up, Scotty!" achievement once you locate and teleport all 5 captains.
Captain 1 - Mission 3 (Bottom left hand near the first Refinery)