sentences:  Like "Only Fools and Horses", "Sink or Swim" was filmed in Bristol doubling for London.It ran for three series between 4 December 1980 and 14 October 1982 and was written by Alex Shearer, who later wrote the Nicholas Lyndhurst sitcom "The Two of Us" for LWT from 1986 to 1990.Production of the sitcom overlapped the first two years of Davison also starring as the Fifth Doctor in "Doctor Who", which imposed constraints on the recording schedules.