Corrected entry: When SG-1 gets rescued aboard the submarine, they get debriefed by Jack O'Neill. He pulls out a memory card and plugs it into a flat screen TV. The TV also acts as some sort of touchscreen. The year is 1939. (00:32:00 - 00:33:00)
Corrected entry: When Ba'al's symbiote is removed it is shown to be a Goa'uld about 15 inches long with a fin on its back and pincers. This is a mature larva ready to take a host. A mature Goa'uld that has already taken a host is a slug-like creature approximately 6 inches long.
Correction: This is backwards. The larva symbiote is pinkish and quite small. The fully grown one is grey, with red eyes, pincers and fins.
Correction: The year is NOT 1939 they weren't sent back on time just looped back to an different earth but in 2008.