Powershell Show renamer - extracts S00E00 data from filename and renames files for you.

show_renamer.ps1

param (
    [Parameter(Mandatory=$true)]
    [string]$ShowName
)

$files = Get-ChildItem -File -Filter "*.mkv"

foreach ($file in $files) {
    $seasonEpisode = [regex]::Match($file.Name, 'S\d{2}E\d{2}').Value
    $extension = $file.Extension

    if ($seasonEpisode) {
        $newFileName = "{0} - {1}{2}" -f $ShowName, $seasonEpisode, $extension
        Rename-Item -Path $file.FullName -NewName $newFileName
        Write-Host "Renamed: $($file.Name) -> $newFileName"
    }
    else {
        Write-Host "No season/episode pattern found in: $($file.Name)"
    }
}