If you often find yourself waiting with bated breath for a time traveler to appear in your midst, and give you the secret to the time-space continuum, we've got just the thing for you: a Craigslist ad.
Because all time travelers must be seeking out friends somewhere, right?
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This Doghouse Diaries comic describes the best way to address time travelers so you don't spook them. And remember, you really have to emphasize your ability to keep secrets.

Homepage image: Flickr, Martin Pettitt. Comic illustration courtesy of Doghouse Diaries. Published with permission; all rights reserved.