diff --git a/source/games/sw/src/actor.cpp b/source/games/sw/src/actor.cpp
index 245608528..974c647fe 100644
--- a/source/games/sw/src/actor.cpp
+++ b/source/games/sw/src/actor.cpp
@@ -42,18 +42,6 @@ Prepared for public release: 03/28/2005 - Charlie Wiederhold, 3D Realms
 
 BEGIN_SW_NS
 
-IMPLEMENT_CLASS(DSWActor, false, true)
-IMPLEMENT_POINTERS_START(DSWActor)
-IMPLEMENT_POINTER(ownerActor)
-IMPLEMENT_POINTER(user.lowActor)
-IMPLEMENT_POINTER(user.lowActor)
-IMPLEMENT_POINTER(user.highActor)
-IMPLEMENT_POINTER(user.targetActor)
-IMPLEMENT_POINTER(user.flameActor)
-IMPLEMENT_POINTER(user.attachActor)
-IMPLEMENT_POINTER(user.WpnGoalActor)
-IMPLEMENT_POINTERS_END
-
 extern int jump_grav;
 
 extern STATE s_DebrisNinja[];
diff --git a/source/games/sw/src/bunny.cpp b/source/games/sw/src/bunny.cpp
index bf972f581..5c09c221c 100644
--- a/source/games/sw/src/bunny.cpp
+++ b/source/games/sw/src/bunny.cpp
@@ -951,9 +951,9 @@ int DoBunnyQuickJump(DSWActor* actor)
         DoPickCloseBunny(actor);
 
     // Random Chance of like sexes fighting
-    if (u->lowActor)
+    DSWActor* hitActor = u->lowActor;
+    if (hitActor)
     {
-        auto hitActor = u->lowActor;
         SPRITEp tsp = &hitActor->s();
         USERp tu = hitActor->u();
 
@@ -993,9 +993,9 @@ int DoBunnyQuickJump(DSWActor* actor)
     }
 
     // Get layed!
-    if (u->lowActor && u->spal == PALETTE_PLAYER8) // Only males check this
+    hitActor = u->lowActor;
+    if (hitActor && u->spal == PALETTE_PLAYER8) // Only males check this
     {
-        auto hitActor = u->lowActor;
         SPRITEp tsp = &hitActor->s();
         USERp tu = hitActor->u();
 
diff --git a/source/games/sw/src/draw.cpp b/source/games/sw/src/draw.cpp
index 1e4c5669a..c97cffc96 100644
--- a/source/games/sw/src/draw.cpp
+++ b/source/games/sw/src/draw.cpp
@@ -1364,12 +1364,16 @@ void UpdateWallPortalState()
         }
         else
         {
-            auto sp = &mirror[i].cameraActor->s();
-            if (!TEST_BOOL1(sp))
+            DSWActor* cam = mirror[i].cameraActor;
+            if (cam)
             {
-                wal->portalflags = PORTAL_WALL_TO_SPRITE;
-                wal->portalnum = i;
-                wall_to_sprite_actors[i] = mirror[i].cameraActor;
+                auto sp = &cam->s();
+                if (!TEST_BOOL1(sp))
+                {
+                    wal->portalflags = PORTAL_WALL_TO_SPRITE;
+                    wal->portalnum = i;
+                    wall_to_sprite_actors[i] = cam;
+                }
             }
         }
     }
diff --git a/source/games/sw/src/game.cpp b/source/games/sw/src/game.cpp
index 6a8a4a466..5634c9eb9 100644
--- a/source/games/sw/src/game.cpp
+++ b/source/games/sw/src/game.cpp
@@ -90,6 +90,18 @@ CVAR(Bool, sw_bunnyrockets, false, CVAR_SERVERINFO | CVAR_CHEAT);   // This is a
 
 BEGIN_SW_NS
 
+IMPLEMENT_CLASS(DSWActor, false, true)
+IMPLEMENT_POINTERS_START(DSWActor)
+IMPLEMENT_POINTER(ownerActor)
+IMPLEMENT_POINTER(user.lowActor)
+IMPLEMENT_POINTER(user.lowActor)
+IMPLEMENT_POINTER(user.highActor)
+IMPLEMENT_POINTER(user.targetActor)
+IMPLEMENT_POINTER(user.flameActor)
+IMPLEMENT_POINTER(user.attachActor)
+IMPLEMENT_POINTER(user.WpnGoalActor)
+IMPLEMENT_POINTERS_END
+
 void pClearSpriteList(PLAYERp pp);
 
 extern int sw_snd_scratch;
diff --git a/source/games/sw/src/interpso.cpp b/source/games/sw/src/interpso.cpp
index 2883a6f90..3cc02ffea 100644
--- a/source/games/sw/src/interpso.cpp
+++ b/source/games/sw/src/interpso.cpp
@@ -353,7 +353,8 @@ void so_dointerpolations(int32_t smoothratio)                      // Stick at b
             // instead, using TSPRITE info if possible.
             if (data->curelement >= soi_sprx && data->curelement <= soi_sprz)
             {
-				auto actor = data->actorofang;
+				DSWActor* actor = data->actorofang;
+                if (!actor) continue;
                 USERp u = actor->u();
                 if (u && (actor->s().statnum != STAT_DEFAULT) &&
                     ((TEST(u->Flags, SPR_SKIP4) && (actor->s().statnum <= STAT_SKIP4_INTERP_END)) ||
@@ -362,7 +363,11 @@ void so_dointerpolations(int32_t smoothratio)                      // Stick at b
             }
 
             if (data->curelement == soi_sprang)
-                data->actorofang->s().ang = NORM_ANGLE(data->lastoldipos + MulScale(data->lastangdiff, ratio, 16));
+            {
+                DSWActor* actor = data->actorofang;
+                if (!actor) continue;
+                actor->s().ang = NORM_ANGLE(data->lastoldipos + MulScale(data->lastangdiff, ratio, 16));
+            }
             else
             {
                 delta = data->lastipos - data->lastoldipos;
diff --git a/source/games/sw/src/jweapon.cpp b/source/games/sw/src/jweapon.cpp
index 507326fea..bee304794 100644
--- a/source/games/sw/src/jweapon.cpp
+++ b/source/games/sw/src/jweapon.cpp
@@ -2069,7 +2069,7 @@ int DoCarryFlag(DSWActor* actor)
     SPRITEp sp = &actor->s();
 
     const int FLAG_DETONATE_STATE = 99;
-    auto fown = u->flagOwnerActor;
+    DSWActor* fown = u->flagOwnerActor;
     if (!fown) return 0;
     SPRITEp fp = &fown->s();
     USERp fu = fown->u();
@@ -2226,7 +2226,7 @@ int DoCarryFlagNoDet(DSWActor* actor)
 
     SPRITEp ap = &u->attachActor->s();
     USERp au = u->attachActor->u();
-    auto fown = u->flagOwnerActor;
+    DSWActor* fown = u->flagOwnerActor;
     if (!fown) return 0;
     SPRITEp fp = &fown->s();
     USERp fu = fown->u();
diff --git a/source/games/sw/src/player.cpp b/source/games/sw/src/player.cpp
index e808b6a6d..82eeef9cd 100644
--- a/source/games/sw/src/player.cpp
+++ b/source/games/sw/src/player.cpp
@@ -2556,7 +2556,8 @@ void DoPlayerMoveVehicle(PLAYERp pp)
 {
     int z;
     int floor_dist;
-    auto actor = pp->sop->sp_child;
+    DSWActor* actor = pp->sop->sp_child;
+    if (!actor) return;
     SPRITEp sp = &actor->s();
     auto psp = &pp->Actor()->s();
     USERp u = actor->u();
diff --git a/source/games/sw/src/track.cpp b/source/games/sw/src/track.cpp
index 2c4101ae5..11b77d7c9 100644
--- a/source/games/sw/src/track.cpp
+++ b/source/games/sw/src/track.cpp
@@ -1748,7 +1748,8 @@ PlayerPart:
 
 	for (i = 0; sop->so_actors[i] != nullptr; i++)
 	{
-		auto actor = sop->so_actors[i];
+        DSWActor* actor = sop->so_actors[i];
+        if (!actor) continue;
 		sp = &actor->s();
 		u = actor->u();
 
@@ -1977,7 +1978,8 @@ void KillSectorObjectSprites(SECTOR_OBJECTp sop)
 
     for (i = 0; sop->so_actors[i] != nullptr; i++)
     {
-		auto actor = sop->so_actors[i];
+		DSWActor* actor = sop->so_actors[i];
+        if (!actor) continue;
         sp = &actor->s();
         u = actor->u();
 
@@ -2002,8 +2004,9 @@ void UpdateSectorObjectSprites(SECTOR_OBJECTp sop)
 
 	for (i = 0; sop->so_actors[i] != nullptr; i++)
 	{
-		auto actor = sop->so_actors[i];
-		sp = &actor->s();
+        DSWActor* actor = sop->so_actors[i];
+        if (!actor) continue;
+        sp = &actor->s();
 
         SetActorZ(actor, &sp->pos);
     }
@@ -2837,7 +2840,9 @@ void DoTornadoObject(SECTOR_OBJECTp sop)
 
 void DoAutoTurretObject(SECTOR_OBJECTp sop)
 {
-    auto actor = sop->sp_child;
+    DSWActor* actor = sop->sp_child;
+    if (!actor) return;
+
     USERp u = actor->u();
     short delta_ang;
     int diff;
@@ -2861,8 +2866,9 @@ void DoAutoTurretObject(SECTOR_OBJECTp sop)
     {
 		for (i = 0; sop->so_actors[i] != nullptr; i++)
         {
-			auto sActor = sop->so_actors[i];
-			auto shootp = &sActor->s();
+            DSWActor* sActor = sop->so_actors[i];
+            if (!sActor) continue;
+            auto shootp = &sActor->s();
 
 			if (shootp->statnum == STAT_SO_SHOOT_POINT)
             {
@@ -2887,7 +2893,9 @@ void DoAutoTurretObject(SECTOR_OBJECTp sop)
         {
 			for (i = 0; sop->so_actors[i] != nullptr; i++)
 			{
-				auto sActor = sop->so_actors[i];
+                DSWActor* sActor = sop->so_actors[i];
+                if (!sActor) continue;
+
 				auto shootp = &sActor->s();
 
 				if (shootp->statnum == STAT_SO_SHOOT_POINT)
diff --git a/source/games/sw/src/weapon.cpp b/source/games/sw/src/weapon.cpp
index 2e1449e89..e82ab64a1 100644
--- a/source/games/sw/src/weapon.cpp
+++ b/source/games/sw/src/weapon.cpp
@@ -4216,7 +4216,8 @@ bool VehicleMoveHit(DSWActor* actor)
     sop = u->sop_parent;
 
     // sprite controlling sop
-    auto ctrlr = sop->controller;
+    DSWActor*  ctrlr = sop->controller;
+    if (!ctrlr) return false;
     cp = &ctrlr->s();
 
     switch (u->coll.type)
@@ -5280,7 +5281,7 @@ int ActorStdMissile(DSWActor* actor, DSWActor* weapActor)
     }
 
     // Reset the weapons target before dying
-    auto goal = wu->WpnGoalActor;
+    DSWActor* goal = wu->WpnGoalActor;
     if (goal != nullptr)
     {
         // attempt to see if it was killed
@@ -8182,7 +8183,8 @@ int DoPlasmaFountain(DSWActor* actor)
     }
     else
     {
-        auto attachActor = u->attachActor;
+        DSWActor* attachActor = u->attachActor;
+        if (!attachActor) return 0;
         ap = &attachActor->s();
 
         // move with sprite
@@ -8887,7 +8889,7 @@ int DoMineStuck(DSWActor* actor)
     constexpr int MINE_DETONATE_STATE = 99;
 
     // if no Owner then die
-    auto attachActor = u->attachActor;
+    DSWActor* attachActor = u->attachActor;
     if (attachActor != nullptr)
     {
         SPRITEp ap = &attachActor->s();
@@ -9343,7 +9345,7 @@ int DoEMPBurst(DSWActor* actor)
     USER* u = actor->u();
     SPRITEp sp = &actor->s();
 
-    auto attachActor = u->attachActor;
+    DSWActor* attachActor = u->attachActor;
     if (attachActor != nullptr)
     {
         SPRITEp ap = &attachActor->s();
@@ -13185,7 +13187,7 @@ DSWActor* AimHitscanToTarget(DSWActor* actor, int *z, short *ang, int z_ratio)
     SPRITEp hp;
     USERp hu;
 
-    auto hitActor = u->targetActor;
+    DSWActor* hitActor = u->targetActor;
     if (hitActor == nullptr)
         return nullptr;
 
@@ -16808,7 +16810,8 @@ int InitSobjGun(PLAYERp pp)
 
     for (i = 0; pp->sop->so_actors[i] != nullptr; i++)
     {
-		auto actor = pp->sop->so_actors[i];
+		DSWActor* actor = pp->sop->so_actors[i];
+        if (!actor) continue;
 		sp = &actor->s();
         if (sp->statnum == STAT_SO_SHOOT_POINT)
         {
@@ -17079,7 +17082,8 @@ int InitTurretMgun(SECTOR_OBJECTp sop)
 
     for (i = 0; sop->so_actors[i] != nullptr; i++)
     {
-		auto actor = sop->so_actors[i];
+		DSWActor* actor = sop->so_actors[i];
+        if (!actor) continue;
 		sp = &actor->s();
         if (sp->statnum == STAT_SO_SHOOT_POINT)
         {