[mythtv-users] How can I re-record a TV series?

[Greg]

  I would like to re-record a TV series..My question is how would I 
reset the previously recorded flag..
I know I can force a re-record on an individual basis,but can this be 
done for a complete series???
  I had all the "Star Trek TNG' episodes and lost them in a crash..I 
would like to start getting them again,but they are all marked 
previously recorded...

TIA