Clarke and Bellamy locate a supply bunker and find a bunch of guns in episode #108 "Day Trip".
The group investigates the crash site of the hijacked dropship in episode #110 "I Am Become Death".
The survivors from the ark set up camp in the remains of Alpha Station in episode #201 "The 48". The camp is renamed Arkadia and expanded in episode #301 "Wanheda".
Abigail goes to meet with Indra to try and negotiate a lighter sentence for Finn in episode #208 "Spacewalker".
Octavia leads people in a rescue attempt after the missile attack in episode #213 "Resurrection".
Mulder spies on a military investigation into a crashed U.F.O. in episode #110 "Fallen Angel".
From episode #318.
From episode #409.
From episode #413.
From episode #504.
From episode #513.
SG-1 arrives at Earth's secret off-world base which was recently destroyed by Anubis in episode #716 "Death Knell".