When an oil rig is destroyed in a seemingly accidental collision with a freighter, NAIA Investigator Ellie Molaro's suspicions about the disaster seem to be confirmed when a mysterious man contacts her claiming to have answers.
Did You Know?
When Carter calls Ellie as she is walking outside while at work, she tells him that next time, they will meet on her terms. However, she does not know his number or indeed how to contact him at all, as evidenced by his having to give her a burner phone when they do meet at the Ferris wheel, should she wish to contact him again.
When Ellie answers the phone in this scene, she looks at the phone and knows it is Carter, as evidenced by the initial dialogue "what do you want?" and thus has his number at the time. During the interim (off-camera), she calls to set up the meeting on the Ferris wheel, after which he goes dark. Thus the need for the burner phone. If there's a plot hole here, it's that he allowed her to have his number briefly, which would be a character error that, however unlikely, is not entirely infeasible. See more