Is Casualty the first program to have 2 spin-offs running at the same time?? Or for that matter has any other show had 2 spin-offs??
And secondly Holby...do they actually say where in the UK its supposed to be....It has its own airport, football team etc. I'd always assumed it was very close to Bristol (where they film Casualty) due to the shots of the suspension bridge and accents etc. I guess its just a generic UK city
Happy Days spawned Mork & Mindy and Jonie Loves Chachi, as well as Laverne and Shirley. Being a spin-off itself (of Love, American Style), I'd say this was pretty much the most, but I'm sure I'll be proved wrong!