Call me a grumpy old man if you like, but on an average week it can be hard to see the point of BBC Three - unless the point is for an overly expansionist state broadcaster to patronise the nation’s youth as a generation of weight- and Wag-obsessed delinquents with an unhealthy taste for autism and Asperger’s. But then on rare good weeks – or perhaps even years - along comes an original show like Little Britain, Being Human or Blood, Sweat and T-Shirts which suggest that maybe, just maybe, all that investment has been worthwhile. Pulse, the pilot for a potential new hospital horror series, hints at such promise.