“Thank God It’s Friday. Again” is episode six of season one of Farscape.
D’Argo flies into a hyperrage and tries to find and kill Crichton, before leaving the ship and going to a nearby planet. When found, he appears to have calmed down more than a little, and wants to stay there. He doesn’t seem to be acting quite right.. The planet appears pleasant, but there is something going on under the surface. Someone tries to kill Rygel with an explosive device, and Zhaan quickly starts to behave oddly too. People seem to continually think the next day is a rest day, when it isn’t.
We find some more information about Pilot in this episode. It seems to be the name for members of his species in general – they don’t appear to have individual names – and they are all bonded to Leviathans (the living ships like Moya).
Every source does seem to agree that this is actually episode six of the season.