A period is a designation within Project Platinum.
Main page: Period 1
Period 1 is lead by Commander Samson Noble, code name Helium.
The first period is special as it hosts only two people; one Ensign and one Commander. The reason for this is that ensign Henry Boyle was still in the need of education in order to graduate and start Project Platinum, and therefore was assigned a 'private tutor'; Commander Samson Noble. In official missions, Period 1 almost always operates together with Period 2.
Main page: Period 2
Period 2 is lead by Commander Nova Noble, code name Neon.
Main page: Period 3
Period 3 is lead by Commander Riley Noble, code name Argon.
Main page: Period 4
Period 4 is lead by Commander Rune Noble, code name Krypton.
Main page: Period 5
Period 5 is lead by Commander Neil Noble, code name Xenon.
Main page: Period 6
Period 6 is lead by Commander Amir, code name Radon.