Factual error: At the start, just after Sydney has the phone call regarding Will, she goes to meet her dad and says that they can save Will, if they get the Rambaldi document from the CIA and the ampule from SD6. In fact, it is the other way round; the CIA have the ampule, and SD6 have the page.
Suggested correction: SD6 got the ampule off Sark after catching him when Vaughn left him to help Sydny.
I am afraid not, Vaughan recovers the ampule before leaving to save Sydney. Thus CIA still has the ampule.
Factual error: Sydney is sent to Malaga, Spain, but right after the location pops on the screen it fades to the city hall in Stockholm, Sweden.
Rendezvous - S1-E21
Factual error: When Sloane is talking to Emily on the telephone, Sloane's phone emits a call waiting beep and the camera focuses on the phone's screen. There are two factual errors here: 1) The phone icon for "Line 1" near the top right hand corner of the phone display is in the "on-hook" position indicating that there is no call in place. 2) The call information is displayed incorrectly. It is obvious that this is a Cisco XML card with the text entered. (00:32:10)