I noticed something in ep1
Upon my rewatch I noticed that in episode one when they tried to get into Caltech and that buff guy, tried to storm it and was shot immediately...we saw blood splatters on the camera...
Does that count as a 4th wall break?...
My guess is that it is the first hint (especially with the name of the last episode) that they are watched and none of this is real....
My theory is that they didn't invent a dimension traveling machine but a simulation...and we are watching the simulation that has been programmed to " what happens if we invented a machine like that" as a prompt...or smith like that :p