Crikey, is this really the twentieth episode?
We have all been so mesmerised by this excellent series that time has just flown by.
Which is ironic really, because in tonight's offering on BBC2, time, erm, flew by!
The writers ripped up the rulebook tonight by taking us five years into the future where the fated bomb detonated and blew New York to smithereens.
We got the chance to see the characters we know and love in a completely new light, and this provided a refreshing and original change.
Hiro Nakamura (Masi Oka) once again steals the show. Usually wonderfully excitable, he is now a wanted terrorist and master of the sword. Oka portrays both characters superbly and puts in a brilliant performance.
Far from being one of those lame clip shows, this episode still provides the levels of excitement and emotional pathos we are used too.
The final scene, when present day Hiro sees his future self killed, is as shocking and powerful as anything we have seen so far.
And when Sylar (Zachary Quinto) finally manages to kill Claire Bennett (Hayden Panettiere), it provides a chilling vision of what our heroes may face in the future.
Time travel is a tricky subject, leading to some confusion as we try to link past and future.
But in the main this gloomy look at 'what might be' sets us up perfectly for the three part finale which begins next week. We now know what happens if it all goes pear-shaped....
