When Jack, Gwen and Rex enter the larger part of the warehouse, Jack remarks that it's "bigger on the inside", a quote that is often used in Doctor Who by those who first enter the TARDIS.
Rex offering the team a plan of action and being stopped by Jack saying "so who's giving the orders?" only for Jack to accept said plan a second later when asked for his own, is possibly a reference for the ninth Doctor doing the same to Jack in the Doctor Who episode Boom Town (2005), only the Ninth Doctor stopped Jack with the line "excuse me. Who's in charge?"
This episode takes place in March 2011.