diff --git a/migrations/Version20230512222044.php b/migrations/Version20230512222044.php
new file mode 100644
index 0000000..c6e28a8
--- /dev/null
+++ b/migrations/Version20230512222044.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20230512222044 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE SCHEMA public');
+    }
+}
diff --git a/migrations/Version20230512222100.php b/migrations/Version20230512222100.php
new file mode 100644
index 0000000..e25f8f6
--- /dev/null
+++ b/migrations/Version20230512222100.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20230512222100 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE episode ALTER description DROP NOT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE SCHEMA public');
+        $this->addSql('ALTER TABLE episode ALTER description SET NOT NULL');
+    }
+}
diff --git a/src/Command/DownloadCommand.php b/src/Command/DownloadCommand.php
new file mode 100644
index 0000000..56aee40
--- /dev/null
+++ b/src/Command/DownloadCommand.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace App\Command;
+
+use App\Constants;
+use App\Entity\Episode;
+use App\Repository\PodcastRepository;
+use App\Service\DownloadService;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+#[AsCommand(
+    name: 'app:download',
+    description: 'Add a short description for your command',
+)]
+class DownloadCommand extends Command
+{
+    public function __construct(
+        protected DownloadService $downloadService,
+        protected EntityManagerInterface $entityManager,
+        protected PodcastRepository $podcastRepository,
+        protected ParameterBagInterface $parameterBag,
+    )
+    {
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this
+            ->addArgument('url', InputArgument::REQUIRED, 'URL to download')
+            ->addArgument('podcast', InputArgument::REQUIRED, 'Podcast slug')
+            ->addOption('title', '-t', InputOption::VALUE_REQUIRED, 'Episode title')
+            ->addOption('description', '-d', InputOption::VALUE_REQUIRED, 'Episode description')
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $io = new SymfonyStyle($input, $output);
+        $url = $input->getArgument('url');
+        $io->info(sprintf('Downloading: %s', $url));
+
+        $slug = $input->getArgument('podcast');
+        $podcast = $this->podcastRepository->findOneBy(['slug' => $slug]);
+        if ($podcast === null) {
+            $io->error("No podcast with slug $slug.");
+            return Command::FAILURE;
+        }
+
+        $filepath = $this->downloadService->download($url);
+        if ($filepath === false) {
+            $io->error('Download failed.');
+            return Command::FAILURE;
+        }
+
+        $filename = basename($filepath);
+        $publicFilepath =
+            $this->parameterBag->get('kernel.project_dir')
+            . '/'
+            . Constants::BASE_PUBLIC_DIR
+            . Constants::FILES_BASE_PATH
+            . $filename;
+        rename($filepath, $publicFilepath);
+
+        $episode = new Episode();
+        $episode->setTitle($input->getOption('title') ?: $filename);
+        $episode->setDescription($input->getOption('description'));
+        $episode->setAudioFilename($filename);
+        $episode->setPodcast($podcast);
+        $episode->setPublicationDate(date_create());
+        $this->entityManager->persist($episode);
+        $this->entityManager->flush();
+
+        $io->success("New Episode '{$episode->getTitle()}' added.");
+
+        return Command::SUCCESS;
+    }
+}
diff --git a/src/Controller/Admin/PodcastCrudController.php b/src/Controller/Admin/PodcastCrudController.php
index 3d05b03..692ba15 100644
--- a/src/Controller/Admin/PodcastCrudController.php
+++ b/src/Controller/Admin/PodcastCrudController.php
@@ -22,6 +22,7 @@ class PodcastCrudController extends AbstractCrudController
     {
         return [
             TextField::new('name'),
+            TextField::new('slug'),
             UrlField::new('website'),
             TextEditorField::new('description'),
             TextField::new('author'),
diff --git a/src/Entity/Episode.php b/src/Entity/Episode.php
index f06998d..d06372f 100644
--- a/src/Entity/Episode.php
+++ b/src/Entity/Episode.php
@@ -9,7 +9,6 @@ use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
 
 #[ORM\Entity(repositoryClass: EpisodeRepository::class)]
-##[Vich\Uploadable]
 class Episode
 {
     #[ORM\Id]
@@ -20,8 +19,8 @@ class Episode
     #[ORM\Column(length: 255)]
     private string $title;
 
-    #[ORM\Column(type: Types::TEXT)]
-    private string $description;
+    #[ORM\Column(type: Types::TEXT, nullable: true)]
+    private ?string $description;
 
     #[ORM\Column(length: 255, nullable: true)]
     private ?string $audioFilename;
@@ -50,12 +49,12 @@ class Episode
         return $this;
     }
 
-    public function getDescription(): string
+    public function getDescription(): ?string
     {
         return $this->description;
     }
 
-    public function setDescription(string $description): self
+    public function setDescription(?string $description): self
     {
         $this->description = $description;
 
diff --git a/src/Entity/Podcast.php b/src/Entity/Podcast.php
index 1f172e2..c8e8c87 100644
--- a/src/Entity/Podcast.php
+++ b/src/Entity/Podcast.php
@@ -7,10 +7,11 @@ use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
+use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\String\Slugger\SluggerInterface;
 
 #[ORM\Entity(repositoryClass: PodcastRepository::class)]
-#[ORM\HasLifecycleCallbacks]
+#[UniqueEntity('slug')]
 class Podcast
 {
     #[ORM\Id]
@@ -81,7 +82,6 @@ class Podcast
         return $this;
     }
 
-    #[ORM\PrePersist]
     public function generateSlug(SluggerInterface $slugger): void
     {
         $this->slug = $this->id . '-' . $slugger->slug($this->name)->lower();
diff --git a/src/EntityListener/PodcastEntityListener.php b/src/EntityListener/PodcastEntityListener.php
new file mode 100644
index 0000000..0fc9260
--- /dev/null
+++ b/src/EntityListener/PodcastEntityListener.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace App\EntityListener;
+
+use App\Entity\Podcast;
+use Doctrine\Bundle\DoctrineBundle\Attribute\AsEntityListener;
+use Doctrine\ORM\Events;
+use Doctrine\Persistence\Event\LifecycleEventArgs;
+use Symfony\Component\String\Slugger\SluggerInterface;
+
+#[AsEntityListener(event: Events::prePersist, entity: Podcast::class)]
+#[AsEntityListener(event: Events::preUpdate, entity: Podcast::class)]
+class PodcastEntityListener
+{
+    public function __construct(private SluggerInterface $slugger) {}
+
+    public function prePersist(Podcast $podcast, LifecycleEventArgs $event)
+    {
+        $podcast->generateSlug($this->slugger);
+    }
+
+    public function preUpdate(Podcast $podcast, LifecycleEventArgs $event)
+    {
+        $podcast->generateSlug($this->slugger);
+    }
+}
diff --git a/src/Service/DownloadService.php b/src/Service/DownloadService.php
new file mode 100644
index 0000000..4bb25f9
--- /dev/null
+++ b/src/Service/DownloadService.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Service;
+
+use App\Entity\Episode;
+use App\Entity\Podcast;
+use Psr\Log\LoggerInterface;
+
+class DownloadService
+{
+    public function __construct(
+        protected LoggerInterface $logger,
+        protected YoutubeService $youtubeService,
+    ) {}
+
+    /**
+     * Download the audio from this URL and return its filepath.
+     */
+    public function download(string $url): string|false
+    {
+        // For now assume every URL is a Youtube URL.
+        return $this->youtubeService->download($url);
+    }
+}
diff --git a/src/Service/FeedService.php b/src/Service/FeedService.php
index d6d96ea..66fa1ea 100644
--- a/src/Service/FeedService.php
+++ b/src/Service/FeedService.php
@@ -13,18 +13,14 @@ use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 
 class FeedService
 {
-    protected EntityManagerInterface $entityManager;
-    protected ParameterBagInterface $parameterBag;
     protected string $baseFeedUrl;
 
     public function __construct(
-        EntityManagerInterface $entityManager,
-        ParameterBagInterface $parameterBag,
+        protected EntityManagerInterface $entityManager,
+        protected ParameterBagInterface $parameterBag,
         UrlGeneratorInterface $urlGenerator,
     )
     {
-        $this->entityManager = $entityManager;
-        $this->parameterBag = $parameterBag;
         $this->baseFeedUrl = $urlGenerator->generate(
             'app_index',
             [],
diff --git a/src/Service/YoutubeService.php b/src/Service/YoutubeService.php
new file mode 100644
index 0000000..90a4206
--- /dev/null
+++ b/src/Service/YoutubeService.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Service;
+
+use App\Constants;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Process\Exception\ProcessFailedException;
+use Symfony\Component\Process\Process;
+
+class YoutubeService
+{
+    public function __construct(protected LoggerInterface $logger) {}
+
+    public function download(string $url): string|false
+    {
+        $process = new Process([
+            'yt-dlp',
+            '-x',
+            '-O', 'after_move:filepath', '--restrict-filenames',
+            '-P', sys_get_temp_dir(),
+            $url
+        ]);
+        try {
+            $process->mustRun();
+        }
+        catch (ProcessFailedException $exception) {
+            $this->logger->error(
+                'yt-dlp process failed: {error}',
+                ['error' => $exception->getMessage()]
+            );
+            return false;
+        }
+
+        $filepath = trim($process->getOutput());
+        $this->logger->info(
+            'Success for URL "{url}": {filepath}',
+            ['url' => $url, 'filepath' => $filepath]
+        );
+        return $filepath;
+    }
+}