Newt is out on a date (something that he never ever does because people are difficult), and it's going less than great. (Degree of not greatness can be up to anon. I'm okay with anything from vaguely awkward to violently creepy, as long as it doesn't cross the line to actual noncon.) He frantically tries to text Tina an SOS but, in his panic, gets the wrong number. Nevertheless, there's someone coming to his rescue. Someone tall, with killer taste in coats.

BONUS IF: Newt doesn't realize he's got the wrong number until his rescuer appears.

I'm okay with Newt and Graves being actual, complete strangers, or acquaintances who exchanged numbers for something entirely innocuous (work or something inconsequential). Whatever anon wants to make the wrong number trope work.