diff --git a/src/NzbDrone.Core.Test/Datastore/WhereBuilderFixture.cs b/src/NzbDrone.Core.Test/Datastore/WhereBuilderFixture.cs
index 1d6b6cb3f..b1cccc8d5 100644
--- a/src/NzbDrone.Core.Test/Datastore/WhereBuilderFixture.cs
+++ b/src/NzbDrone.Core.Test/Datastore/WhereBuilderFixture.cs
@@ -169,6 +169,16 @@ namespace NzbDrone.Core.Test.Datastore
             _subject.ToString().Should().Be($"((\"Movies\".\"CleanTitle\" = @Clause1_P1) AND (\"Movies\".\"Id\" IN (1, 2, 3)))");
         }
 
+        [Test]
+        public void where_in_string_list()
+        {
+            var list = new List<string> { "first", "second", "third" };
+
+            _subject = Where(x => list.Contains(x.CleanTitle));
+
+            _subject.ToString().Should().Be($"(\"Movies\".\"CleanTitle\" IN @Clause1_P1)");
+        }
+
         [Test]
         public void enum_as_int()
         {
diff --git a/src/NzbDrone.Core/Datastore/WhereBuilder.cs b/src/NzbDrone.Core/Datastore/WhereBuilder.cs
index e42d0e990..e1b6fb7f9 100644
--- a/src/NzbDrone.Core/Datastore/WhereBuilder.cs
+++ b/src/NzbDrone.Core/Datastore/WhereBuilder.cs
@@ -275,7 +275,7 @@ namespace NzbDrone.Core.Datastore
         {
             var list = expression.Object;
 
-            if (list != null && (list.Type == typeof(string) || list.Type == typeof(List<string>)))
+            if (list != null && (list.Type == typeof(string)))
             {
                 ParseStringContains(expression);
                 return;
diff --git a/src/NzbDrone.Core/Movies/MovieRepository.cs b/src/NzbDrone.Core/Movies/MovieRepository.cs
index 03f55de70..b53a9458d 100644
--- a/src/NzbDrone.Core/Movies/MovieRepository.cs
+++ b/src/NzbDrone.Core/Movies/MovieRepository.cs
@@ -101,8 +101,9 @@ namespace NzbDrone.Core.Movies
 
         public List<Movie> FindByTitles(List<string> titles)
         {
-            return Query(Builder().OrWhere<Movie>(x => titles.Contains(x.CleanTitle))
-                         .OrWhere<AlternativeTitle>(x => titles.Contains(x.CleanTitle)));
+            var distinct = titles.Distinct().ToList();
+            return Query(Builder().OrWhere<Movie>(x => distinct.Contains(x.CleanTitle))
+                         .OrWhere<AlternativeTitle>(x => distinct.Contains(x.CleanTitle)));
         }
 
         public List<Movie> FindByTitleInexact(string cleanTitle)