However, eagle-eyed viewers would have spotted that Den was not wearing his signet ring when he was shot.

(Keen eyed viewers can even spot the Bewdley sign in a reflection in a window in the opening scene.)

However some keen-eyed viewers spotted an anomaly on this video:

But viewers could spot awkward moments.

No sooner do creative media people invent one video stunt than viewers spot the manipulation and begin to guard against it.

Attentive viewers could spot when he decided to mix chuckles together to give the effect of a more diverse audience.

'I'm hopeless with the till - I ring up the same price for everything and I'm always worried a keen-eyed viewer will spot it!'

The next day, a viewer spotted James at the California state unemployment office in Bakersfield and contacted authorities.

Amid the almost uniform sadness viewers can spot little moments of obvious pleasure in life.

Montague's eligibility was only called into question after a viewer spotted him during a rerun of the show on Challenge.