diff --git a/TODO b/TODO
index 159fe77..bc722f5 100644
--- a/TODO
+++ b/TODO
@@ -28,7 +28,6 @@ Scripting:
 Sync / inputs:
 * Widget for displaying single inputs
 * Widget for displaying overrides
-* Check for inputs/overrides that no longer exist
 * Structure for undoing actions
 	* Curve file external updates
 	* Segment creation
diff --git a/sync.cc b/sync.cc
index 7828f1c..5acf01e 100644
--- a/sync.cc
+++ b/sync.cc
@@ -764,6 +764,19 @@ void T_SyncManager::mergeOverrides(
 	);
 }
 
+bool T_SyncManager::overrideExists(
+		T_String const& id ) const noexcept
+{
+	return soTable_.contains( id );
+}
+
+A_SyncOverride* T_SyncManager::getOverride(
+		T_String const& id ) const noexcept
+{
+	const auto rv{ soTable_.get( id ) };
+	return rv ? *rv : nullptr;
+}
+
 void T_SyncManager::setOverridesActive(
 		const bool active ,
 		const uint32_t n ,
diff --git a/sync.hh b/sync.hh
index e6a5d7c..f0f3cd0 100644
--- a/sync.hh
+++ b/sync.hh
@@ -369,6 +369,9 @@ struct T_SyncManager : public virtual A_MouseCtrl
 	void clearOverrides( ) noexcept;
 	void mergeOverrides( T_SyncOverrideSection& overrides );
 
+	bool overrideExists( T_String const& id ) const noexcept;
+	A_SyncOverride* getOverride( T_String const& id ) const noexcept;
+
 	// Mark a bunch of inputs as overridden / not overridden
 	void setOverridesActive( bool active ,
 			uint32_t n ,
diff --git a/syncview.cc b/syncview.cc
index c5b0bab..d162fba 100644
--- a/syncview.cc
+++ b/syncview.cc
@@ -155,19 +155,11 @@ struct T_SyncViewImpl_
 	static constexpr float SeqHeaderHeight = 24;
 	static constexpr float BarWidth = 40;
 
-	const uint32_t ColFrame{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , .8 } ) };
-	const uint32_t ColHeader{ ImGui::GetColorU32( ImVec4{ .5 , .5 , .5 , .8 } ) };
-	const uint32_t ColHeaderText{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , 1 } ) };
-	const uint32_t ColMain{ ImGui::GetColorU32( ImVec4{ .4 , .4 , .4 , .8 } ) };
-	const uint32_t ColSelection{ ImGui::GetColorU32( ImVec4{ .8 , 1 , .8 , .2 } ) };
-	const ImVec2 BtSize{ 20 , 0 };
-
-	float zoomLevel{ 0.f };
-	float startPos{ 0.f };
-	bool followTime{ true };
-
 	bool display( ) noexcept;
 
+    private:
+	// Make sure all displayed curves/inputs/overrides still exist
+	void checkSelectedCurves( ) noexcept;
 	void displayToolbar( ) noexcept;
 
 	void computeMetrics( float innerWidth ) noexcept;
@@ -179,6 +171,19 @@ struct T_SyncViewImpl_
 	void displayCurveSelector( ) noexcept;
 	void displayOverrideSelector( ) noexcept;
 
+	// Colors, sizes, etc.
+	const uint32_t ColFrame{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , .8 } ) };
+	const uint32_t ColHeader{ ImGui::GetColorU32( ImVec4{ .5 , .5 , .5 , .8 } ) };
+	const uint32_t ColHeaderText{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , 1 } ) };
+	const uint32_t ColMain{ ImGui::GetColorU32( ImVec4{ .4 , .4 , .4 , .8 } ) };
+	const uint32_t ColSelection{ ImGui::GetColorU32( ImVec4{ .8 , 1 , .8 , .2 } ) };
+	const ImVec2 BtSize{ 20 , 0 };
+
+	// Sequencer settings
+	float zoomLevel{ 0.f };
+	float startPos{ 0.f };
+	bool followTime{ true };
+
 	// Misc stuff
 	T_StringBuilder stringBuffer;	// XXX damn this shit to fucking hell
 
@@ -229,6 +234,7 @@ bool T_SyncViewImpl_::display( ) noexcept
 		return false;
 	}
 
+	checkSelectedCurves( );
 	displayToolbar( );
 
 	//----------------------------------------------------------------------
@@ -255,6 +261,48 @@ bool T_SyncViewImpl_::display( ) noexcept
 	return true;
 }
 
+void T_SyncViewImpl_::checkSelectedCurves( ) noexcept
+{
+	auto& sync{ Globals::Sync( ) };
+
+	// Check for "dead" overrides
+	{
+		bool ovRemoved{ false };
+		for ( auto i = 0u ; i < sOverrides.size( ) ; ) {
+			if ( sync.overrideExists( sOverrides[ i ] ) ) {
+				i ++;
+			} else {
+				sOverrides.remove( sOverrides[ i ] );
+				ovRemoved = true;
+			}
+		}
+		if ( !ovRemoved ) {
+			return;
+		}
+	}
+
+	// Remove all curves that come from overrides
+	for ( auto i = 0u ; i < sCurves.size( ) ; ) {
+		if ( sCurves.values( )[ i ] ) {
+			sCurves.remove( sCurves.keys( )[ i ] );
+		} else {
+			i ++;
+		}
+	}
+
+	// Re-add curves for the remaining overrides
+	const auto no{ sOverrides.size( ) };
+	for ( auto i = 0u ; i < no ; i ++ ) {
+		auto const* od{ sync.getOverride( sOverrides[ i ] ) };
+		assert( od );
+		const auto ni{ od->inputNames( ).size( ) };
+		for ( auto j = 0u ; j < ni ; j ++ ) {
+			const bool ok{ sCurves.add( od->inputNames( )[ j ] , true ) };
+			assert( ok ); (void) ok;
+		}
+	}
+}
+
 void T_SyncViewImpl_::displayToolbar( ) noexcept
 {
 	using namespace ImGui;