if you can make an episode

[Wraith Scientist]

If we want a hallucinatory psychological one then how about this for a plot:

The Ancients are experimenting with Wraith psionic abilities. They have a facilily where they were conducting their experiments. They also made an artificial intelligence to run the facility. A Wraith AI managed to get into the system and merge with the Ancient AI, becoming unstable and psychotic. The insane AI played mind games with the Ancient scientists, playing on fear until they were driven insane. When the SGA team arrive, the AI torments them too, using against them the things humans fear most, trying to drive them insane too. In the end, they outwit and deactivate the AI and create a new one from its core code and give it to Weir to run the city.

[ShadowMaat]

Too easy. Might be more interesting if the Ancients tried to create an AI, didn't like the result and tried to kill it, only to have the AI rebel, kill the scientists and go into hiding... something for McKay or someone to inadvertently awaken. Ep could be spent trying to survive the intelligence and attempting to convince it that they don't want to kill it (although that may or may not be true).

Or have the Ancients capture a Wraith AI to study/torture/interrogate it and then abandon it when they abandon the city. Slowly, through the millennia, the Wraith AI has gone insane from loneliness. If they can salvage it and sway it to their side, it could prove a big boon for the good guys. But can you really trust a Wraith AI?

AI plotlines tend to be a bit overdone and thus predictible, though. Although ironically I've been working on a fic that features an AI... of sorts. So they may be overdone and predictible, but they can still be fun to do.

[Ouroboros]

If you remember The Rising Pt 2 then you will remember the last words of the Hive Keeper. "When I die, the rest will awaken." If she had not truly died the other wraith would not have awaken and we would not be fighting the wraith.

The put down was in implying he wasn't good enough to kill the Hive Keeper. It's like saying Sheppard is a total loser.

Fair enough I suppose. There was a thread a while ago where a few people speculated about that scene and wondered if she really had actually died given how easy it was to kill her compared to other Wraith. Obviously we're supposed to assume she's toast until further notice but this is the show where villians usually get at least 3 extra lives before actually being dead so it's not like bringing her back would be some huge unprecidented act of ridiculousness. Can't say it wouldn't be a huge shocker seeing this old "ghost" again. For the audience and the characters.

I wonder if it would be possible to work Peter Williams into my episode in some way. Maybe covered in Wraith makeup so that only the keen eye would really recognise him.

Here's another idea for a plot that I would have done near the begining of season 2.

Earth gets a new president elected in the US and he decides, for whatever reason, that the Atlantis outpost is more trouble/risk than it is potential reward and dispatches a ship (Daedalus) with orders to dismantle the expedition and salvage as much of the city as possible before destroying the rest. He's convinced the Wraith will be back to try to take the city again (assume the whole cloak trick wasn't accomplished here) and that they'll succeed this time since they nearly succeeded last time. As a result he wants to destroy it and it's hyperdrive and call back the Earth expedition in an attempt to cut off the Wraith route to Earth.

Anyway, when this ship shows up Weir and Sheppard have a difficult choice to make. They both beleive/know that the president is wrong about the expedition but at the same time they're technically bound to follow his orders no matter how short-sighted. Eventually the ships captain, who's a hardline military type handpicked by the new president, gets impatient with Weir's passive resistence to his mission and attempts to arrest her. This sparks off a confrontation between Atlantis and the new ship. The ship's crew has already planted several nuclear weapons in the city for the purpose of their demolition mission however so McKay and Zelenka have to race to disarm them. The thing ends with them using one of the nukes in a cloaked PJ to fake their death's the same way they did with the Wraith. Convinced their mission has been accomplished, despite the sad loss of many of the Atlantis expedition to the nuclear blast, the Earth ship leaves to go back home.

The expedition is now cut off from Earth and presumed dead and must fend for itself for at least 4 years until a new president is potentially elected.

This will lead to all sorts of future plots with people in the expedition having potential loyalty to the president or disagreeing with Weir's descision.

The new president also opens up new avenues for stories on SG-1.