Avoid invalid requests for Nebulance

src/NzbDrone.Core/IndexerSearch/Definitions/TvSearchCriteria.cs

@@ -114,7 +114,7 @@ namespace NzbDrone.Core.IndexerSearch.Definitions
             string episodeString;
             if (DateTime.TryParseExact($"{Season} {Episode}", "yyyy MM/dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out var showDate))
             {
-                episodeString = showDate.ToString("yyyy.MM.dd");
+                episodeString = showDate.ToString("yyyy.MM.dd", CultureInfo.InvariantCulture);
             }
             else if (Episode.IsNullOrWhiteSpace())
             {

src/NzbDrone.Core/Indexers/Definitions/BroadcastheNet/BroadcastheNetRequestGenerator.cs

@@ -74,7 +74,7 @@ namespace NzbDrone.Core.Indexers.BroadcastheNet
             else if (DateTime.TryParseExact($"{searchCriteria.Season} {searchCriteria.Episode}", "yyyy MM/dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out var showDate))
             {
                 // Daily Episode
-                parameters.Name = showDate.ToString("yyyy.MM.dd");
+                parameters.Name = showDate.ToString("yyyy.MM.dd", CultureInfo.InvariantCulture);
                 parameters.Category = "Episode";
                 pageableRequests.Add(GetPagedRequests(parameters, btnResults, btnOffset));
             }

src/NzbDrone.Core/Indexers/Definitions/HDBits/HDBitsRequestGenerator.cs

@@ -66,7 +66,7 @@ namespace NzbDrone.Core.Indexers.Definitions.HDBits
 
                 if (DateTime.TryParseExact($"{searchCriteria.Season} {searchCriteria.Episode}", "yyyy MM/dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out var showDate))
                 {
-                    query.Search = showDate.ToString("yyyy-MM-dd");
+                    query.Search = showDate.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
                 }
                 else
                 {

src/NzbDrone.Core/Indexers/Definitions/Nebulance.cs

@@ -41,7 +41,7 @@ namespace NzbDrone.Core.Indexers.Definitions
 
         public override IIndexerRequestGenerator GetRequestGenerator()
         {
-            return new NebulanceRequestGenerator(Settings);
+            return new NebulanceRequestGenerator(Settings, _logger);
         }
 
         public override IParseIndexerResponse GetParser()
@@ -90,10 +90,12 @@ namespace NzbDrone.Core.Indexers.Definitions
     public class NebulanceRequestGenerator : IIndexerRequestGenerator
     {
         private readonly NebulanceSettings _settings;
+        private readonly Logger _logger;
 
-        public NebulanceRequestGenerator(NebulanceSettings settings)
+        public NebulanceRequestGenerator(NebulanceSettings settings, Logger logger)
         {
             _settings = settings;
+            _logger = logger;
         }
 
         public IndexerPageableRequestChain GetSearchRequests(MovieSearchCriteria searchCriteria)
@@ -149,6 +151,17 @@ namespace NzbDrone.Core.Indexers.Definitions
                 }
             }
 
+            if ((queryParams.Season.HasValue || queryParams.Episode.HasValue) &&
+                queryParams.Name.IsNullOrWhiteSpace() &&
+                queryParams.Release.IsNullOrWhiteSpace() &&
+                !queryParams.TvMaze.HasValue &&
+                queryParams.Imdb.IsNullOrWhiteSpace())
+            {
+                _logger.Debug("NBL API does not support season calls without name, series, id, imdb, tvmaze, or time keys.");
+
+                return new IndexerPageableRequestChain();
+            }
+
             pageableRequests.Add(GetPagedRequests(queryParams, searchCriteria.Limit, searchCriteria.Offset));
 
             return pageableRequests;