Immediately after the intro sequence, Daniel's desk is shown with a picture of James Spader, who portrayed Daniel Jackson in Stargate (1994).
When Jack says, "We'll do it! It's what we do, isn't it?" it's reminiscent of Nick Marlowe's "Hey! It's what I do." from Stargate SG-1 (1997) Wormhole X-Treme! (2001).