diff --git a/mist/Makefile b/mist/Makefile
index 01c1fbea..08530dbd 100644
--- a/mist/Makefile
+++ b/mist/Makefile
@@ -312,7 +312,8 @@ dentist.o:	dentist.s zp.inc hardware.inc common_defines.inc \
 	common_routines.inc \
 	graphics_dentist/dentist_graphics.inc \
 	leveldata_dentist.inc \
-	dentist_panel.s
+	dentist_panel.s \
+	marker_switch.s
 	ca65 -o dentist.o dentist.s -l dentist.lst
 
 
diff --git a/mist/dentist.s b/mist/dentist.s
index efbc7132..3d08ed04 100644
--- a/mist/dentist.s
+++ b/mist/dentist.s
@@ -74,13 +74,11 @@ game_loop:
 	; handle special-case forground logic
 	;====================================
 
+	jsr	draw_marker_switch
+
 	lda	LOCATION
 	cmp	#DENTIST_PANEL
 	beq	fg_draw_panel
-;	cmp	#NIBEL_RED_TABLE_OPEN
-;	beq	fg_draw_red_page
-;	cmp	#NIBEL_BLUE_HOUSE_VIEWER
-;	beq	animate_viewer
 
 	jmp	nothing_special
 
@@ -137,10 +135,52 @@ really_exit:
 	;===========================
 
 back_to_mist:
+	lda	DIRECTION
+	cmp	#DIRECTION_S
+	beq	go_back_to_mist
+oh_its_the_marker_switch:
+
+	lda	CURSOR_X
+	cmp	#10
+	bcs	use_door
+	lda	CURSOR_Y
+	cmp	#28
+	bcc	use_door
+	cmp	#40
+	bcs	use_door
+
+	lda	#MARKER_DENTIST
+	jmp	click_marker_switch
+use_door:
+	lda	LOCATION
+	cmp	#DENTIST_OUTSIDE
+	bne	go_inside
+
+open_door:
+	lda	#DENTIST_OUTSIDE_OPEN
+	sta	LOCATION
+	jmp	change_location
+
+go_inside:
+	lda	#DENTIST_INSIDE_DOOR
+	sta	LOCATION
+	jmp	change_location
+
+go_back_to_mist:
 	lda	#MIST_STEPS_4TH_LANDING
 	sta	LOCATION
 
+	lda	CURSOR_X
+	cmp	#20
+	bcs	go_west_young_man
+
+	lda	#DIRECTION_E
+	jmp	steps_direction
+
+go_west_young_man:
 	lda	#DIRECTION_W
+
+steps_direction:
 	sta	DIRECTION
 
 	lda	#LOAD_MIST
@@ -150,6 +190,7 @@ set_level_over:
 	lda	#$ff
 	sta	LEVEL_OVER
 
+done_door:
 	rts
 
 	;===========================
@@ -280,6 +321,7 @@ lights_are_off:
 
 	; puzzles
 	.include	"dentist_panel.s"
+	.include	"marker_switch.s"
 
 	; level data
 	.include	"leveldata_dentist.inc"
diff --git a/mist/graphics_dentist/dentist_door_n.png b/mist/graphics_dentist/dentist_door_n.png
index 17bd4d6e..613c21b8 100644
Binary files a/mist/graphics_dentist/dentist_door_n.png and b/mist/graphics_dentist/dentist_door_n.png differ
diff --git a/mist/graphics_dentist/dentist_door_open_dark_n.png b/mist/graphics_dentist/dentist_door_open_dark_n.png
index ada85006..dfcc3ca0 100644
Binary files a/mist/graphics_dentist/dentist_door_open_dark_n.png and b/mist/graphics_dentist/dentist_door_open_dark_n.png differ
diff --git a/mist/graphics_dentist/dentist_door_open_n.png b/mist/graphics_dentist/dentist_door_open_n.png
index 1ff890dc..bdd6b5c6 100644
Binary files a/mist/graphics_dentist/dentist_door_open_n.png and b/mist/graphics_dentist/dentist_door_open_n.png differ
diff --git a/mist/graphics_dentist/panel.png b/mist/graphics_dentist/panel.png
index cffb0756..24914690 100644
Binary files a/mist/graphics_dentist/panel.png and b/mist/graphics_dentist/panel.png differ
diff --git a/mist/leveldata_dentist.inc b/mist/leveldata_dentist.inc
index 3e578924..fcddaf22 100644
--- a/mist/leveldata_dentist.inc
+++ b/mist/leveldata_dentist.inc
@@ -21,8 +21,8 @@ location0:
 	.word	$0000			; east bg
 	.word	$0000			; west bg
 	.byte	BG_NORTH | BG_SOUTH
-	.byte	DIRECTION_S	; special exit
-	.byte	10,30		; special x
+	.byte	DIRECTION_S|DIRECTION_N	; special exit
+	.byte	4,30		; special x
 	.byte	0,46		; special y
 	.word	back_to_mist-1
 
@@ -41,8 +41,8 @@ location1:
 	.word	$0000				; east bg
 	.word	$0000				; west bg
 	.byte	BG_NORTH | BG_SOUTH
-	.byte	DIRECTION_S	; special exit
-	.byte	10,30		; special x
+	.byte	DIRECTION_S|DIRECTION_N	; special exit
+	.byte	4,30		; special x
 	.byte	0,46		; special y
 	.word	back_to_mist-1
 
diff --git a/mist/marker_switch.s b/mist/marker_switch.s
index 6f19fa54..86e5291e 100644
--- a/mist/marker_switch.s
+++ b/mist/marker_switch.s
@@ -7,6 +7,7 @@
 ; cab/0	MARKER_TREE	= $20	CABIN_OUTSIDE		E	5
 ; 13	MARKER_POOL	= $40	MIST_TREE_CORRIDOR_2	N	6
 ; den/0 MARKER_DENTIST	= $80	DENTIST_OUTSIDE		N	7
+; den/1 MARKER_DENTIST	= $80	DENTIST_OUTSIDE_OPEN	N	7
 
 ; up is on
 
@@ -33,6 +34,17 @@ marker_sprite_on:
 	.byte $6A,$6A
 	.byte $AA,$AA
 
+marker_wide_sprite_off:
+	.byte 3,2
+	.byte $AA,$AA,$AA
+	.byte $6A,$6A,$6A
+
+marker_wide_sprite_on:
+	.byte 3,2
+	.byte $96,$A6,$96
+	.byte $AA,$55,$AA
+
+
 marker_sprites_on:
 	.word marker_sprite_on	; dock
 	.word marker_sprite_on	; gears
@@ -41,7 +53,7 @@ marker_sprites_on:
 	.word marker_sprite_on	; clock
 	.word marker_sprite_on	; tree
 	.word marker_sprite_on	; pool
-	.word marker_sprite_on	; dentist
+	.word marker_wide_sprite_on	; dentist
 
 marker_sprites_off:
 	.word marker_sprite_off	; dock
@@ -51,7 +63,7 @@ marker_sprites_off:
 	.word marker_sprite_off	; clock
 	.word marker_sprite_off	; tree
 	.word marker_sprite_off	; pool
-	.word marker_sprite_off	; dentist
+	.word marker_wide_sprite_off	; dentist
 
 marker_sprites_direction:
 	.byte DIRECTION_N	; dock
@@ -71,7 +83,7 @@ marker_sprites_xy:
 	.byte 5,28	; clock
 	.byte 10,10	; tree
 	.byte 28,18	; pool
-	.byte 10,10	; dentist
+	.byte 5,32	; dentist
 
 ; FIXME: use generic log2 table somewhere
 marker_which:
@@ -122,10 +134,14 @@ check_ms_pool:
 	bne	done_draw_marker
 	ldy	#6
 	bne	draw_marker
+
 marker_check_dentist:
 	lda	LOCATION
 	cmp	#DENTIST_OUTSIDE
+	beq	dentist_marker
+	cmp	#DENTIST_OUTSIDE_OPEN
 	bne	done_draw_marker
+dentist_marker:
 	ldy	#7
 	bne	draw_marker		; bra
 marker_check_cabin: