Acting for Two: Erik Knudsen in Season 3, as Red/Scar Alec and Green/Other/Piron Alec.
Casting Gag: Perhaps an accidental one — TahmohPenikett appears as a somewhat-crooked union politician who eventually wins a by-election to become the new mayor of Vancouver. His father, Tony Penikett, was the Premier of Canada's Yukon Territory from 1985 to 1992.
Fake Nationality: Rachel Nichols is herself American, playing someone from Vancouver. Her accent becomes obvious when Kiera and Alec say "sorry" to each other in the same scene. Fittingly, Kiera masquerades as someone from Portland in 2012.
Screwed by the Network: It's hard not to conclude that Showcase's executives dearly wish that Continuum would just die and go away already — they have barely promoted it at all since the first season, and they waited for over five months of total silence from Season 3's conclusion in June 2014 all the way to December of that year to finally (and quietly) announce Continuum's renewal for a fourth and final season of only six episodes. Season 4, in turn, is only set to air starting in September 2015, and on top of that the show has been bumped from its Sunday time-slot to a new position at 9 PM on Friday nights.
What Could Have Been: As mentioned above, Continuum only ran for 4 seasons, however creator Simon Barry said outright there was enough story in mind for 7 to 10 seasons if the show had aired for that long. One can only wonder what would have happened in those 3 to 6 extra seasons ...