diff --git a/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesRow.js b/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesRow.js
index 89a2d8260..7777c768f 100644
--- a/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesRow.js
+++ b/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesRow.js
@@ -10,6 +10,7 @@ import styles from './ImportSeriesRow.css';
 function ImportSeriesRow(props) {
   const {
     id,
+    relativePath,
     monitor,
     qualityProfileId,
     seasonFolder,
@@ -32,7 +33,7 @@ function ImportSeriesRow(props) {
       />
 
       <VirtualTableRowCell className={styles.folder}>
-        {id}
+        {relativePath}
       </VirtualTableRowCell>
 
       <VirtualTableRowCell className={styles.monitor}>
@@ -84,6 +85,7 @@ function ImportSeriesRow(props) {
 
 ImportSeriesRow.propTypes = {
   id: PropTypes.string.isRequired,
+  relativePath: PropTypes.string.isRequired,
   monitor: PropTypes.string.isRequired,
   qualityProfileId: PropTypes.number.isRequired,
   seriesType: PropTypes.string.isRequired,
diff --git a/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTable.js b/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTable.js
index 45e23a1b7..aa78925f2 100644
--- a/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTable.js
+++ b/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTable.js
@@ -32,7 +32,7 @@ class ImportSeriesTable extends Component {
     unmappedFolders.forEach((unmappedFolder) => {
       const id = unmappedFolder.name;
 
-      onSeriesLookup(id, unmappedFolder.path);
+      onSeriesLookup(id, unmappedFolder.path, unmappedFolder.relativePath);
 
       onSetImportSeriesValue({
         id,
diff --git a/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTableConnector.js b/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTableConnector.js
index 09dfae097..8a26fbe79 100644
--- a/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTableConnector.js
+++ b/frontend/src/AddSeries/ImportSeries/Import/ImportSeriesTableConnector.js
@@ -26,10 +26,11 @@ function createMapStateToProps() {
 
 function createMapDispatchToProps(dispatch, props) {
   return {
-    onSeriesLookup(name, path) {
+    onSeriesLookup(name, path, relativePath) {
       dispatch(queueLookupSeries({
         name,
         path,
+        relativePath,
         term: name
       }));
     },
diff --git a/frontend/src/Store/Actions/importSeriesActions.js b/frontend/src/Store/Actions/importSeriesActions.js
index 46cbb5add..75ec76591 100644
--- a/frontend/src/Store/Actions/importSeriesActions.js
+++ b/frontend/src/Store/Actions/importSeriesActions.js
@@ -67,6 +67,7 @@ export const actionHandlers = handleThunks({
     const {
       name,
       path,
+      relativePath,
       term,
       topOfQueue = false
     } = payload;
@@ -76,6 +77,7 @@ export const actionHandlers = handleThunks({
       id: name,
       term,
       path,
+      relativePath,
       isFetching: false,
       isPopulated: false,
       error: null
diff --git a/src/NzbDrone.Core.Test/RootFolderTests/RootFolderServiceFixture.cs b/src/NzbDrone.Core.Test/RootFolderTests/RootFolderServiceFixture.cs
index 0e3906652..2e283f31c 100644
--- a/src/NzbDrone.Core.Test/RootFolderTests/RootFolderServiceFixture.cs
+++ b/src/NzbDrone.Core.Test/RootFolderTests/RootFolderServiceFixture.cs
@@ -7,6 +7,7 @@ using FluentAssertions;
 using Moq;
 using NUnit.Framework;
 using NzbDrone.Common.Disk;
+using NzbDrone.Core.Organizer;
 using NzbDrone.Core.RootFolders;
 using NzbDrone.Core.Test.Framework;
 using NzbDrone.Core.Tv;
@@ -17,9 +18,13 @@ namespace NzbDrone.Core.Test.RootFolderTests
     [TestFixture]
     public class RootFolderServiceFixture : CoreTest<RootFolderService>
     {
+        private NamingConfig _namingConfig;
+
         [SetUp]
         public void Setup()
         {
+            _namingConfig = NamingConfig.Default;
+
             Mocker.GetMock<IDiskProvider>()
                   .Setup(m => m.FolderExists(It.IsAny<string>()))
                   .Returns(true);
@@ -31,6 +36,10 @@ namespace NzbDrone.Core.Test.RootFolderTests
             Mocker.GetMock<IRootFolderRepository>()
                   .Setup(s => s.All())
                   .Returns(new List<RootFolder>());
+
+            Mocker.GetMock<INamingConfigService>()
+                  .Setup(c => c.GetConfig())
+                  .Returns(_namingConfig);
         }
 
         private void WithNonExistingFolder()
@@ -140,5 +149,47 @@ namespace NzbDrone.Core.Test.RootFolderTests
             unmappedFolders.Count.Should().BeGreaterThan(0);
             unmappedFolders.Should().NotContain(u => u.Name == subFolder);
         }
+
+        [Test]
+        public void should_get_unmapped_folders_inside_letter_subfolder()
+        {
+            _namingConfig.SeriesFolderFormat = "{Series TitleFirstCharacter}\\{Series Title}";
+
+            var rootFolderPath = @"C:\Test\TV".AsOsAgnostic();
+            var rootFolder = Builder<RootFolder>.CreateNew()
+                .With(r => r.Path = rootFolderPath)
+                .Build();
+
+            var subFolderPath = Path.Combine(rootFolderPath, "S");
+
+            var subFolders = new[]
+            {
+                "Series1",
+                "Series2",
+                "Series3",
+            };
+
+            var folders = subFolders.Select(f => Path.Combine(subFolderPath, f)).ToArray();
+
+            Mocker.GetMock<IRootFolderRepository>()
+                .Setup(s => s.Get(It.IsAny<int>()))
+                .Returns(rootFolder);
+
+            Mocker.GetMock<ISeriesRepository>()
+                .Setup(s => s.AllSeriesPaths())
+                .Returns(new Dictionary<int, string>());
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(s => s.GetDirectories(rootFolder.Path))
+                .Returns(new[] { subFolderPath });
+
+            Mocker.GetMock<IDiskProvider>()
+                .Setup(s => s.GetDirectories(subFolderPath))
+                .Returns(folders);
+
+            var unmappedFolders = Subject.Get(rootFolder.Id, false).UnmappedFolders;
+
+            unmappedFolders.Count.Should().Be(3);
+        }
     }
 }
diff --git a/src/NzbDrone.Core/RootFolders/RootFolder.cs b/src/NzbDrone.Core/RootFolders/RootFolder.cs
index 7e6c5444b..26fc1b3d0 100644
--- a/src/NzbDrone.Core/RootFolders/RootFolder.cs
+++ b/src/NzbDrone.Core/RootFolders/RootFolder.cs
@@ -6,7 +6,6 @@ namespace NzbDrone.Core.RootFolders
     public class RootFolder : ModelBase
     {
         public string Path { get; set; }
-
         public bool Accessible { get; set; }
         public long? FreeSpace { get; set; }
         public long? TotalSpace { get; set; }
diff --git a/src/NzbDrone.Core/RootFolders/RootFolderService.cs b/src/NzbDrone.Core/RootFolders/RootFolderService.cs
index 441099da3..23b75631c 100644
--- a/src/NzbDrone.Core/RootFolders/RootFolderService.cs
+++ b/src/NzbDrone.Core/RootFolders/RootFolderService.cs
@@ -7,6 +7,7 @@ using NLog;
 using NzbDrone.Common;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Organizer;
 using NzbDrone.Core.Tv;
 
 namespace NzbDrone.Core.RootFolders
@@ -26,6 +27,7 @@ namespace NzbDrone.Core.RootFolders
         private readonly IRootFolderRepository _rootFolderRepository;
         private readonly IDiskProvider _diskProvider;
         private readonly ISeriesRepository _seriesRepository;
+        private readonly INamingConfigService _namingConfigService;
         private readonly Logger _logger;
 
         private static readonly HashSet<string> SpecialFolders = new HashSet<string>
@@ -44,11 +46,13 @@ namespace NzbDrone.Core.RootFolders
         public RootFolderService(IRootFolderRepository rootFolderRepository,
                                  IDiskProvider diskProvider,
                                  ISeriesRepository seriesRepository,
+                                 INamingConfigService namingConfigService,
                                  Logger logger)
         {
             _rootFolderRepository = rootFolderRepository;
             _diskProvider = diskProvider;
             _seriesRepository = seriesRepository;
+            _namingConfigService = namingConfigService;
             _logger = logger;
         }
 
@@ -139,13 +143,28 @@ namespace NzbDrone.Core.RootFolders
                 return results;
             }
 
+            var subFolderDepth = _namingConfigService.GetConfig().SeriesFolderFormat.Count(f => f == Path.DirectorySeparatorChar);
             var possibleSeriesFolders = _diskProvider.GetDirectories(path).ToList();
+
+            if (subFolderDepth > 0)
+            {
+                for (int i = 0; i < subFolderDepth; i++)
+                {
+                    possibleSeriesFolders = possibleSeriesFolders.SelectMany(_diskProvider.GetDirectories).ToList();
+                }
+            }
+
             var unmappedFolders = possibleSeriesFolders.Except(seriesPaths.Select(s => s.Value), PathEqualityComparer.Instance).ToList();
 
-            foreach (string unmappedFolder in unmappedFolders)
+            foreach (var unmappedFolder in unmappedFolders)
             {
                 var di = new DirectoryInfo(unmappedFolder.Normalize());
-                results.Add(new UnmappedFolder { Name = di.Name, Path = di.FullName });
+                results.Add(new UnmappedFolder
+                {
+                    Name = di.Name,
+                    Path = di.FullName,
+                    RelativePath = path.GetRelativePath(di.FullName)
+                });
             }
 
             var setToRemove = SpecialFolders;
@@ -181,8 +200,8 @@ namespace NzbDrone.Core.RootFolders
 
         private void GetDetails(RootFolder rootFolder, Dictionary<int, string> seriesPaths, bool timeout)
         {
-            Task.Run(() =>
-            {
+            // Task.Run(() =>
+            // {
                 if (_diskProvider.FolderExists(rootFolder.Path))
                 {
                     rootFolder.Accessible = true;
@@ -190,7 +209,8 @@ namespace NzbDrone.Core.RootFolders
                     rootFolder.TotalSpace = _diskProvider.GetTotalSize(rootFolder.Path);
                     rootFolder.UnmappedFolders = GetUnmappedFolders(rootFolder.Path, seriesPaths);
                 }
-            }).Wait(timeout ? 5000 : -1);
+
+            // }).Wait(timeout ? 5000 : -1);
         }
     }
 }
diff --git a/src/NzbDrone.Core/RootFolders/UnmappedFolder.cs b/src/NzbDrone.Core/RootFolders/UnmappedFolder.cs
index 3a8a919de..095edc7b2 100644
--- a/src/NzbDrone.Core/RootFolders/UnmappedFolder.cs
+++ b/src/NzbDrone.Core/RootFolders/UnmappedFolder.cs
@@ -1,8 +1,9 @@
-namespace NzbDrone.Core.RootFolders
+namespace NzbDrone.Core.RootFolders
 {
     public class UnmappedFolder
     {
         public string Name { get; set; }
         public string Path { get; set; }
+        public string RelativePath { get; set; }
     }
 }