Children of the Gods (1) - S1-E1
Question: At the beginning of the episode, Apophis and his serpent guards invade the SGC. My question is: How could they dial out when there wasn't a DHD?
Children of the Gods (1) - S1-E1
Question: I thought that you could only travel one way through the gate, but in the pilot, the Bad Guys come through, kill the military guys, then go back though without dialing a new wormhole.
Answer: You can only travel that way. The wormhole closed after Apophis forces came through (as can be seen during various scenes). Probably they also brought a mobile version of a DHD got get back (this indeed can't be seen).
They have been various times where the stargate has been dialled without use of the DHD of the dialing computer.
Chosen answer: Apparently a ribbon device can activate the gate to the address it was dialed from. Like a sort of "*69" on the phone.
Grumpy Scot