Later, in the local village, Samantha breaks out her laptop to show Lara the fire rain from an astronomical point of view. She explains that Edora, Lara’s world, passes through an asteroid field in its yearly orbit.

Lara then tells Sam of a story about her ancestors and how the fire rain burned the ground for days.

Jack appears in the doorway with a chipper "good morning, campers." When he asks for volunteers to go with Jackson to do a geological survey, Lara volunteers her son Garin.

Carter decides to go back to Earth and do some analysis, leaving Lara and O'Neill free to explore what might be a burgeoning romantic interest.

Daniel patiently explains to Garin and his girlfriend Nathia that the dark bands of naquaada -- the rare mineral that powers the Goa'uld's ultra-advanced technology -- represent major meteor impact events.

Teal'c gets into the pedantic spirit, explaining to the natives that the bands show a 150-year gap between events. Coincidentally, about that length of time has passed since the last major incident.

Back on Earth, Carter warns General Hammond that Edora is facing impact with hundreds of car-sized asteroids in the short term.

Hammond seems unsure about whether to evacuate the Edorans, who are the last vestige of a much larger population the Goa'uld brought to the planet long ago.

Oblivious to all this, Lara introduces Jack to a local fellow who seems less then pleased that SG-1 is here. He seems unable to understand what Earth would want from them.

When Lara asks Jack what Edora has to trade, he explains about the naquaada in the soil, telling her it is "powerful." Since no earthly supplies of the mineral exist, SG-1 would be willing to trade medicine, technology and education for it.

As they walk around the village, they see a large meteor streak overhead, followed by a barrage of impacts, some close by.

Jack calls his team on the com and they meet at the village to evacuate the natives. Many of the people wish to stay behind so Carter, Daniel and Teal'c help the rest get their stuff and go through the gate.

Jack and Lara search for Garin and Nathia, finding them in the caves that Daniel and Teal'c were in earlier. Garin had found pottery in the caves that indicated that their ancestors had survived there, so he brought supplies in the anticipation of the fire rain.

Jack asks them to trust him and to try go through the gate till the storm ends.

Teal'c and Sam stay behind after all the villagers who want to leave have gone ahead. The storm increases in intensity and they are forced to evacuate when a large rock heads straight for the gate.

As they dive through, we can see the firestorm on the other side then the wormhole dissipates. Jack is left behind.

Although Teal'c wants to go back, Sam and Hammond argue him down. Instead, they will wait 24 hours and then send an automated reconnaissance vehicle (MALP) through to look.

Back in the cave, Jack, Lara, Garin and Nathia are all alive and relatively safe. Jack walks out into the rain and sees the once verdant landscape is now red with molten rock.

Since he can’t raise any of his team, he sensibly decides to stay in the cave until the rock cools, huddling with the others in the candlelight.

SGC sends a MALP through the gate but gets no image from the other side. Carter concludes that it has been destroyed and Hammond cancels all rescue attempts pending further data.

Meanwhile, Lara, Jack and the kids go back to the village, only to find the ruins of houses and some wounded survivors.

One particularly disturbing point in the survivors' account of the disaster is the stargate's destruction. Jack runs off to see and finds a large crater where the gate used to be.

That night, O'Neill confronts the survivors at their evening meal. Some blame him for taking their friends and relatives through the gate, making it extremely unlikely that they will ever see their loved ones again.

Always the quick wit, he counters that if they weren’t so stupid and had gone with the refugee group, they would all be together right now. Lara tries to make peace, formally welcoming Jack to the meal.

Back at SGC, another MALP successfully goes through the wormhole but then communication is lost. Carter postulates that the meteor-borne naquaada has hardened above the event horizon like an iris, destroying the drones as they cross over.

Daniel decides to contact earth’s spacefaring allies to try find alternate means of rescuing Jack via conventional travel.

The drawback, of course, is that Stargate Command doesn't have a particle beam generator. They will have to build one.

Jack, meanwhile, digs in the crater for the stargate after a long day of work in the fields. Garin brings him dinner and confesses his guilt that it is his fault that O'Neill can’t go home.

Jack reassures the younger man but keeps digging.

Three months -- nearly a hundred days -- pass.

Now tan and decked out in native clothing, O’Neill paddles downstream in a beautiful handmade canoe, still sporting his trademark SG-1 shades.

Jack and Lara have obviously fallen for each other during this period and O’Neill seems to have adjusted to village life. The natives have accepted him and are gently pressuring him to marry Lara.

Back at SGC, Carter has created a particle beam generator. They send a MALP through and finally receive a few seconds of video, confirming that the gate has fallen into a horizontal position but there is some space on the other side.

Teal'c volunteers to go through and dig the gate out, knowing full well that if it is deeply buried, he will die from lack of air -- if they open the gate again while he is there, the wormhole will vaporize him. He suits up, goes through the gate and starts to dig for his life.

Back on the planet, Lara asks Jack to give her a child and to discard his SG-1 attire because the items remind her of Earth.

He tells her to toss them, so she goes to the lake to throw the stuff away. However, as she prepares to drop his communicator in the water, she hears voices through it.

Although obviously troubled by what this might forebode for their relationship, she tells Jack about the voices at dinner. Jack takes the communicator to the gate site and hears Teal'c, who is busy running out of air.

They dig him out while Lara watches with tears in her eyes.

Later, the refugee villagers return through the gate to be reunited with their loved ones, but Jack and Lara say uncomfortable farewells.

He asks her to come with him but she tells him that she belongs on Edora. He says he will be back soon.

We end with Lara’s bittersweet good-bye, "fair day, and be well."