Onboard the Relay Station
Once you materialize on the station, a Federation scientist will rush up to you, begging for help. Click on the green text to get your next objective. Some personnel are trapped by fire, and you'll have to work your way towards them and get them out. You'll find a set of fire suppression equipment on the wall directly in front of you, to the left of the flaming doorway. Move close enough, then use the "F" key to pick it up.
You'l need to press "U" to open up your inventory and drag the fire suppression unit to one of your device slots. This way you can use it from the hotbar as you work through the station. I highly recommend dealing with any fires you come across, even if you can walk around them because, chances are, your away team members are not going to avoid them and will end up taking damage.
Your first scientist is surrounded by a group of Gorn just east of where you beam in. Take out the fire, then engage the Gorn to rescue the hostage. Afterward, talk to the scientist to beam them back to your ship.
The second group of Gorn is located in a corridor to your West. Take them out then follow the hallway to the next group, found at the top of the ramp.
Take out the fire at the other end of the room and go straight ahead to rescue the next scientist, standing in a short hallway all alone. You'll also find an item crate here to loot. At the North end of the large hallway is a massive room filled with Gorn. As you enter, you'll have to take out a group, so be prepared.
Your next scientist is located atop the raised platform in the large room. You can't see them from the entrance but if you walk up the ramp, taking out any fires along the way, you'll eventually spot them at the other end. Get close enough and beam them to safety.
The final scientist is trapped behind a wall of flame in the antechamber to the West. Clear a path, then beam them out as well. Once the final scientist is clear, you're ready to beam back to your ship.
Back on your ship, your next task is to investigate a dig site on a nearby planet.