When AH.com The Series began in 2005, we were immediately thrust into the setting with the ship fully crewed and the crew's origins a mystery. From the end of Season 1 onwards, this has slowly been filled in with 'origins' episodes that jump back and forth along the timeline, allowing this record of their comings and goings to be constructed.
Time is measured here in years After the Battle with the Devourer or ABD, as it is often cited at the start of flashbacks.
Doctor What and Grey Wolf were on the AH.com Ship from the start and fled from the battle with the Devourer as the only surviving crewmembers. Seen in flashbacks in OF SHIPS AND CAPTAINS and ONCE MORE INTO THE BREECH.
Dave Howery was the first new crewman to be recruited, from a dystopic timeline where America is occupied by various Canadian and European armies led (unbeknownst to him) by Mike Collins. Seen in flashback in TO LIVE AND DIE IN SAULT STE. MARIE.
G.Bone was accidentally teleported up by Dave from his home timeline, a steampunkish world including a more extensive British Empire and an independent Kingdom of Hawaii. He was given the job of working the teleporters. Seen in flashback in SEALIONS ON AN AIRSHIP.
Exact circumstances unknown, but mentioned in HEART OF STEEL.
Exact circumstances unknown, mentioned in HEART OF STEEL and noted that he was recruited in the middle of a chaotic away mission and the crew knew little about him (so no change there then). A week later the crew were attacked by cow-like space pirates, who were defeated when Weapon M ate them.
As seen in HEART OF STEEL; Leo is an A.I. from a wholly robotic world whose humans died off after being radioactively poisoned by their technology - unbeknownst to most of the A.I.s like Leo, who idolise the 'Makers', this was deliberate on the part of the plotting thinking machine leaders or Autoexecs. Leo flees the planet when Paul Spring and Analytical Engine lead it into an apocalyptic civil war. Note Leo has only just inviegled himself into control of every system by 2 ABD.
The exact time is not stated in POSITIONS, but Matt obviously joined after Weapon M was established as a crewman but before Psychomeltdown, as he's seen in episodes set later on. Matt originates from a pacifist TL which was ravaged by invaders.
Not covered in detail, but mentioned in AMAZONS & DINOSAURS as happening six weeks before. Psychomeltdown is said to have the death warrant on his head in his home TL, was desperate to get away, and had some basic engineering skills but needed training by Dave.
Also not covered in detail but mentioned in AMAZONS & DINOSAURS as having joined a month before, and is still learning the piloting controls.
After being run ragged by IronYuppie for a few weeks, the AH.commers pick up Landshark, a nobleman from a Britwank TL with early 20th century technology, after his world is invaded by the Conservapedia Empire. Landshark proceeds to consume all IronYuppie's attentions, much to everyone else's relief. Seen in flashback in QUEEN OF THE DRAGONS.
(Actually said to be 5 ABD in the episode, MY NAME IS GLADIATOR). Apparently Othniel, who comes from a surviving-Roman-Empire world where Christians are persecuted, joined not long before the start of Season 1.
Events of Season 1.
Events of Season 2.
Flocc and Luakel both join from a timeline with a flying Singapore in space, though Luakel is already a crosstime traveller and originates from another timeline (said elsewhere to be a socially conservative one where, among other things, Prohibition never ended). Seen in THE HUNT FOR US AIN'T OVER, though this Flocc first appeared in DO THE ANIME-TION the year earlier.
DMA rejoins the crew in JIHAD ON THEIR ARSES.
Events of Season 3.
Othniel leaves in THE GOOD, THE BAD AND THE UGLY to hunt after Straha.
Othniel returns from his quest to rejoin the crew in THE MACHINE.
Events of Season 4.
Events of Season 5.