diff --git a/Kyoo.Common/Controllers/IRepository.cs b/Kyoo.Common/Controllers/IRepository.cs
index baf7e1cc..07c8043d 100644
--- a/Kyoo.Common/Controllers/IRepository.cs
+++ b/Kyoo.Common/Controllers/IRepository.cs
@@ -28,8 +28,11 @@ namespace Kyoo.Controllers
 	{
 		Task<Episode> Get(string showSlug, long seasonNumber, long episodeNumber);
 	}
-	
-	public interface ITrackRepository : IRepository<Track> {}
+
+	public interface ITrackRepository : IRepository<Track>
+	{
+		Task<Track> Get(long episodeID, string languageTag, bool isForced);
+	}
 	public interface ILibraryRepository : IRepository<Library> {}
 	public interface ICollectionRepository : IRepository<Collection> {}
 	public interface IGenreRepository : IRepository<Genre> {}
diff --git a/Kyoo/Controllers/Repositories/EpisodeRepository.cs b/Kyoo/Controllers/Repositories/EpisodeRepository.cs
index 3f934f35..bc32b92c 100644
--- a/Kyoo/Controllers/Repositories/EpisodeRepository.cs
+++ b/Kyoo/Controllers/Repositories/EpisodeRepository.cs
@@ -63,8 +63,7 @@ namespace Kyoo.Controllers
 		{
 			if (obj == null)
 				throw new ArgumentNullException(nameof(obj));
-
-			// TODO initialize ShowID & SeaosnID here. (same for the season repository). OR null check the ID and throw on invalid.
+			
 			obj.Show = null;
 			obj.Season = null;
 			await Validate(obj);
@@ -105,6 +104,9 @@ namespace Kyoo.Controllers
 
 		private async Task Validate(Episode obj)
 		{
+			if (obj.ShowID <= 0)
+				throw new InvalidOperationException($"Can't store an episode not related to any show (showID: {obj.ShowID}).");
+
 			obj.ExternalIDs = (await Task.WhenAll(obj.ExternalIDs.Select(async x =>
 			{
 				x.ProviderID = await _providers.CreateIfNotExists(x.Provider);
diff --git a/Kyoo/Controllers/Repositories/SeasonRepository.cs b/Kyoo/Controllers/Repositories/SeasonRepository.cs
index 056d64a6..86bd5d6f 100644
--- a/Kyoo/Controllers/Repositories/SeasonRepository.cs
+++ b/Kyoo/Controllers/Repositories/SeasonRepository.cs
@@ -100,6 +100,9 @@ namespace Kyoo.Controllers
 
 		private async Task Validate(Season obj)
 		{
+			if (obj.ShowID <= 0)
+				throw new InvalidOperationException($"Can't store a season not related to any show (showID: {obj.ShowID}).");
+			
 			obj.ExternalIDs = (await Task.WhenAll(obj.ExternalIDs.Select(async x =>
 			{
 				x.ProviderID = await _providers.CreateIfNotExists(x.Provider);
diff --git a/Kyoo/Controllers/Repositories/TrackRepository.cs b/Kyoo/Controllers/Repositories/TrackRepository.cs
new file mode 100644
index 00000000..a5d58aa0
--- /dev/null
+++ b/Kyoo/Controllers/Repositories/TrackRepository.cs
@@ -0,0 +1,88 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Kyoo.Models;
+using Kyoo.Models.Exceptions;
+using Microsoft.EntityFrameworkCore;
+
+namespace Kyoo.Controllers
+{
+	public class TrackRepository : ITrackRepository
+	{
+		private readonly DatabaseContext _database;
+
+
+		public TrackRepository(DatabaseContext database)
+		{
+			_database = database;
+		}
+		
+		public async Task<Track> Get(long id)
+		{
+			return await _database.Tracks.FirstOrDefaultAsync(x => x.ID == id);
+		}
+		
+		public Task<Track> Get(string slug)
+		{
+			throw new InvalidOperationException("Tracks do not support the get by slug method.");
+		}
+
+		public Task<Track> Get(long episodeID, string languageTag, bool isForced)
+		{
+			return _database.Tracks.FirstOrDefaultAsync(x => x.EpisodeID == episodeID
+			                                                       && x.Language == languageTag
+			                                                       && x.IsForced == isForced);
+		}
+
+		public Task<IEnumerable<Track>> Search(string query)
+		{
+			throw new InvalidOperationException("Tracks do not support the search method.");
+		}
+
+		public async Task<IEnumerable<Track>> GetAll()
+		{
+			return await _database.Tracks.ToListAsync();
+		}
+
+		public async Task<long> Create(Track obj)
+		{
+			if (obj == null)
+				throw new ArgumentNullException(nameof(obj));
+
+			if (obj.EpisodeID <= 0)
+				throw new InvalidOperationException($"Can't store a track not related to any episode (episodeID: {obj.EpisodeID}).");
+			
+			obj.Episode = null;
+			await _database.Tracks.AddAsync(obj);
+			await _database.SaveChangesAsync();
+			return obj.ID;
+		}
+		
+		public Task<long> CreateIfNotExists(Track obj)
+		{
+			return Create(obj);
+		}
+
+		public async Task Edit(Track edited, bool resetOld)
+		{
+			if (edited == null)
+				throw new ArgumentNullException(nameof(edited));
+			
+			Track old = await Get(edited.ID);
+
+			if (old == null)
+				throw new ItemNotFound($"No track found with the ID {edited.ID}.");
+			
+			if (resetOld)
+				Utility.Nullify(old);
+			Utility.Merge(old, edited);
+			await _database.SaveChangesAsync();
+		}
+
+		public async Task Delete(Track obj)
+		{
+			_database.Tracks.Remove(obj);
+			await _database.SaveChangesAsync();
+		}
+	}
+}
\ No newline at end of file