A example plugboard template that returns what I think you want follows. It returns a special string if the series matches some value, otherwise it returns the series. If the series is empty it returns the empty string.
Code:
program:
s = $series;
# s = 'ᕼ ᗩ ᒪ ᖴ - ᒪ I ᖴ ᗴ';
first_non_empty(
if s == 'ᕼ ᗩ ᒪ ᖴ - ᒪ I ᖴ ᗴ' then 'Half-life' fi,
# add more lines here if needed
s
)