Outnumbered (UK TV series) as supporting characters throughout the five series. Samantha Bond has appeared in all series as Auntie Angela, Sue's sister. David Ryall has appeared as Grandad, Sue and Angela's father in series 1 and 2 as well as the Christmas Specials in 2009 and 2011. Rosalind Ayres has appeared as Gran, Pete's mother in series 3, series 4 and the Christmas Special in 2012. Hattie Morahan has appeared in series 1 and 2, as well as the Christmas Specials as Jane. In June 2012, "Outnumbered" was recommissioned for a Christmas special in 2012. A fifth and final series was commissioned and
All-or-none law contraction is not increased if the stimulus strength is further raised. Stronger stimuli bring more muscle fibres into action and thus the tension of a muscle increases as the strength of the stimulus applied to it rises. All-or-none law The all-or-none law is the principle that the strength by which a nerve or muscle fibre responds to a stimulus is independent of the strength of the stimulus. If that stimulus exceeds the threshold potential, the nerve or muscle fibre will give a complete response; otherwise, there is no response. It was first established by the American physiologist Henry Pickering Bowditch