'Fringe': 'Everything in Its Right Place' in pictures
However, they're there for business, not pleasure - namely hunting down a vigilante with a somewhat unexpected connection to the shapeshifters.
Fringe continues on Friday at 9/8c on Fox. In the UK, the show airs on Sky1.
> 'Fringe': 'Nothing as It Seems' recap
Photo gallery - Fringe episode 'Everything in Its Right Place'