The hash example seems a little convoluted. So I guess that the splice example is better.

Alternatively it might be better to drop the unwanted lines when you are reading the data:

sub new_splice {

    my @kills = @_;
    my $datafile = "shows.data";
    open(GETSPL, $datafile) or die "Cannot open $datafile: $!";

    my @rows;
    while (<GETSPL>) {
        # Only store the lines not listed in @kills
        push @rows, $_ unless grep {$_ == $. -1} @kills;        
    }

    close(GETSPL);

    print @rows;
}
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--
John.