Frisky Dingo, Sealab 2021, and Archer all take place in the same world
Frisky Dingo and Archer take place at the same time (kinda like GTA IV and its 2 DLC games) and somewhere along the line caused Sealab 2021 to happen. Adam Reed's next show will fill in the 11-13 years following the other 2.- Confirmed, in a way. Archer seems to take place in the same universe as the two shows, with Mr. Ford showing up in a few episodes ("Drift Problem", "Legs", "Reignition Sequence") and Simone in one ("Nellis"), and Cheryl even name-drops Wendell Stamps in "Reignition Sequence". Also, in the Season 4 finale, the ISIS crew visit the Sealab.
Xander Crews, Archer, and Murphy are all related
They all have the same sort of personality and roughly the same IQ.