The Night the Cylons Landed was created on 1980-04-20.
A year then another 4 months after the cylons came
I Have Landed was created on 2002-05-14.
The Ego Has Landed was created in 1997.
Landed - album - was created in 1975-02.
Crash Landed was created in 2009-07.
The Weekend Has Landed was created on 2009-10-26.
The Series Has Landed was created on 1999-04-04.
The Eagle Has Landed was created on 1975-09-08.
Burke's Landed Gentry was created in 1826.
By your command
There are no aliens on Battlestar Galactica. There are humans and cylons.
Night Unto Night was created in 1949.