diff --git a/Makefile b/Makefile
index e4570845..f0cdcee9 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@ SRC = syseng sysen1 sysen2 sysen3 sysnet kshack dragon channa	\
       fonts zork 11logo kmp info aplogo bkph bbn pdp11 chsncp sca music1 \
       moon teach ken lmio1 llogo a2deh chsgtv clib sys3 lmio turnip \
       mits_s rab stan_k bs cstacy kp dcp2 -pics- victor imlac rjl mb bh \
-      lars drnil radia gjd maint bolio cent
+      lars drnil radia gjd maint bolio cent shrdlu
 DOC = info _info_ sysdoc sysnet syshst kshack _teco_ emacs emacs1 c kcc \
       chprog sail draw wl pc tj6 share _glpr_ _xgpr_ inquir mudman system \
       xfont maxout ucode moon acount alan channa fonts games graphs humor \
@@ -37,7 +37,7 @@ DOC = info _info_ sysdoc sysnet syshst kshack _teco_ emacs emacs1 c kcc \
       combat pdl minits mits_s chaos hal -pics- imlac maint cent ksc klh
 BIN = sys sys1 sys2 emacs _teco_ lisp liblsp alan inquir sail comlap \
       c decsys graphs draw datdrw fonts fonts1 fonts2 games macsym \
-      maint imlac _www_ gt40 llogo bawden sysbin -pics- lmman r
+      maint imlac _www_ gt40 llogo bawden sysbin -pics- lmman r shrdlu
 MINSRC = midas system $(DDT) $(SALV) $(KSFEDR) $(DUMP)
 
 # These are not included on the tape.
diff --git a/bin/shrdlu/ts.twdemo b/bin/shrdlu/ts.twdemo
new file mode 100644
index 00000000..85f010de
Binary files /dev/null and b/bin/shrdlu/ts.twdemo differ
diff --git a/doc/programs.md b/doc/programs.md
index 906253ff..3481c559 100644
--- a/doc/programs.md
+++ b/doc/programs.md
@@ -343,6 +343,7 @@
 - TTYLIN, Chaosnet TTYLINK server.
 - TTYSWP, swap TTYs.
 - TTYTST, echo characters exactly as typed.
+- TWDEMO, scripted demonstration of SHRDLU.
 - TYPE8, type 8-bit file.
 - UFIND, find users.
 - ULISP, Lisp in Lisp.
diff --git a/src/shrdlu/demo.flick b/src/shrdlu/demo.flick
new file mode 100644
index 00000000..8413e68a
--- /dev/null
+++ b/src/shrdlu/demo.flick
@@ -0,0 +1,305 @@
+(SETQ ERRLIST '((VALRET ':TWDEMO/ )))
+(IOC W)
+(SETQ PCONSTANT 1)(SETQ PRANDOM 0)
+(SETQ WAIT 100)
+(SETQ MECONSTANT 1)(SETQ MERANDOM 0)
+(SETQ YOUCONSTANT 1)(SETQ YOURANDOM 3)
+(SETQ TEXTSIZE 2)
+(DISME)(DISYOU)(DTHRU)
+
+
+@  PICK UP A BIG RED BLOCK.@
+(DISME)(FRAME WAIT)
+(MOVETO 100 340 500) 
+(GRASP (QUOTE :B7)) 
+(MOVETO 600 374 200) 
+(UNGRASP) 
+(MOVETO 100 440 300) 
+(GRASP (QUOTE :B6)) 
+(MOVETO 100 440 1000) 
+(DTHRU) 
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@GRASP THE PYRAMID.@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  I DON'T UNDERSTAND WHICH PYRAMID
+   YOU MEAN.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  FIND A BLOCK WHICH IS TALLER THAN THE ONE 
+  YOU ARE HOLDING AND PUT IT INTO THE 
+ BOX.@
+(DISME)(FRAME WAIT)(DTHRU))
+@BY "IT", I ASSUME YOU MEAN THE BLOCK
+ WHICH IS TALLER THAN THE ONE I AM
+ HOLDING.@
+(MOVETO 140 600 300) (UNGRASP) (MOVETO 400 7
+00 400) (GRASP (QUOTE :B10)) (MOVETO 700 1100
+ 401) (UNGRASP)(DTHRU) 
+(DISME)(DTHRU)
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHAT DOES THE BOX CONTAIN?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  THE BLUE PYRAMID AND THE BLUE BLOCK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+
+@  WHAT IS THE PYRAMID SUPPORTED BY?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  THE BOX.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+
+@  HOW MANY BLOCKS ARE NOT IN THE BOX?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@ FOUR OF THEM.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+
+@  IS AT LEAST ONE OF THEM NARROWER THAN
+ THE ONE WHICH I TOLD YOU TO PICK UP?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  YES,  THE RED CUBE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  IS IT SUPPORTED?@
+(DISME)(FRAME WAIT)(DTHRU)
+@  YES,  BY THE TABLE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+
+@  CAN THE TABLE PICK UP BLOCKS?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  NO.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@CAN A PYRAMID BE SUPPORTED BY A BLOCK?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  YES.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@CAN A PYRAMID SUPPORT A PYRAMID?@
+(DISME)(FRAME WAIT)(DTHRU)
+@  I DON'T KNOW.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  STACK UP TWO PYRAMIDS.@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  I CAN'T.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WILL YOU PLEASE STACK UP BOTH OF THE
+ RED BLOCKS AND EITHER A GREEN CUBE OR
+ A PYRAMID?@
+(DISME)(FRAME WAIT)
+(MOVETO 140 600 300) 
+(GRASP (QUOTE :B6)) 
+(MOVETO 274 1000 300) 
+(UNGRASP) 
+(MOVETO 600 374 200) 
+(GRASP (QUOTE :B7)) 
+(MOVETO 274 1000 500) 
+(UNGRASP) 
+(MOVETO 150 140 200) 
+(GRASP (QUOTE :B2)) 
+(MOVETO 1000 274 100) 
+(UNGRASP) 
+(MOVETO 150 140 100) 
+(GRASP (QUOTE :B1)) 
+(MOVETO 274 1000 600) 
+(UNGRASP) 
+(DTHRU) 
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHICH CUBE IS SITTING ON THE TABLE?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  THE LARGE GREEN ONE WHICH SUPPORTS
+ THE RED PYRAMID.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  IS THERE A LARGE BLOCK BEHIND A
+ PYRAMID?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  YES, THREE OF THEM:  A LARGE RED
+ ONE, A LARGE GREEN CUBE, AND THE
+ BLUE ONE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  PUT A SMALL ONE ONTO THE GREEN CUBE
+ WHICH SUPPORTS A PYRAMID.@
+(DISME)(FRAME WAIT)
+(GRASP (QUOTE :B1)) 
+(MOVETO 477 40 300) 
+(UNGRASP) 
+(DTHRU) 
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@PUT THE LITTLEST PYRAMID ON TOP OF IT.@
+(DISME)(FRAME WAIT)
+(MOVETO 1000 274 100) 
+(GRASP (QUOTE :B2)) 
+(MOVETO 477 40 400) 
+(UNGRASP) 
+(DTHRU) 
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  DOES THE SHORTEST THING THE TALLEST
+ PYRAMID'S SUPPORT SUPPORTS SUPPORT
+ ANYTHING GREEN?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  YES,  THE GREEN PYRAMID.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHAT COLOR IS IT?@
+(DISME)(FRAME WAIT)(DTHRU)
+@BY "IT", I ASSUME YOU MEAN THE SHORTEST
+ THING THE TALLEST PYRAMID'S SUPPORT
+ SUPPORTS.@
+(FRAME WAIT) (DISME)(DTHRU)
+@  RED@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  HOW MANY THINGS ARE ON TOP OF GREEN
+ CUBES?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  I'M NOT SURE WHAT YOU MEAN BY "ON TOP
+ OF "IN THE PHRASE "ON TOP OF GREEN
+ CUBES "  .
+
  DO YOU MEAN:
+1 - DIRECTLY ON THE SURFACE 
+2 - ANWHERE ON TOP OF ?@
+(FRAME WAIT)(DISAD 'YOU NIL  '/ 2)(DISME)(DTHRU) 
+@ THREE OF THEM.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  HAD YOU TOUCHED ANY PYRAMID BEFORE
+ YOU PUT THE GREEN ONE ON THE LITTLE
+ CUBE?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  YES,  THE GREEN ONE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHEN DID YOU PICK IT UP?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  WHILE I WAS STACKING UP THE RED CUBE,
+ A LARGE RED BLOCK AND A LARGE GREEN
+ CUBE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHY?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  TO GET RID OF IT.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHY DID YOU DO THAT?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  TO CLEAN OFF THE RED CUBE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHY DID YOU CLEAR OFF THAT CUBE?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  TO PUT IT ON A LARGE GREEN CUBE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHY DID YOU DO THAT?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  TO STACK UP THE RED CUBE , A LARGE
+ RED BLOCK AND A LARGE GREEN CUBE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHY DID YOU DO THAT?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  BECAUSE YOU ASKED ME TO.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  HOW DID YOU DO IT?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@ BY PUTTING A LARGE RED BLOCK ON THE
+ TABLE ; THEN LETTING GO OF IT ; THEN
+ PUTTING A LARGE GREEN CUBE ON IT ;
+ THEN LETTING GO OF THAT CUBE ; THEN
+ PUTTING THE RED CUBE ON THAT CUBE ;
+ THEN LETTING GO OF THAT CUBE.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  HOW MANY OBJECTS DID YOU TOUCH WHILE
+ YOU WERE DOING IT?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@ FOUR OF THEM.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHAT DID THE RED CUBE SUPPORT BEFORE
+ YOU STARTED TO CLEAN IT OFF?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  THE GREEN PYRAMID.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  THERE WERE FIVE BLOCKS TO THE LEFT OF
+ THE BOX THEN.@
+(DISME)(FRAME WAIT)(DTHRU) 
+@ NO, ONLY FOUR OF THEM: THE RED CUBE ,
+ TWO LARGE GREEN CUBES AND A LARGE RED
+ BLOCK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  PUT THE BLUE PYRAMID ON THE BLOCK IN
+ THE BOX.@
+(UNGRASP)
+(MOVETO 740 740 201)
+(GRASP (QUOTE :B4))
+(MOVETO 700 1100 601)
+(DTHRU) 
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  IS THERE ANYTHING WHICH IS BIGGER
+ THAN EVERY PYRAMID BUT IS NOT AS WIDE
+ AS THE THING THAT SUPPORTS IT?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  YES,  THE BLUE BLOCK. @
+(FRAME WAIT)(DISYOU)(DTHRU)
+@ DOES A STEEPLE@
+(DISME)(DTHRU)
+@SORRY, I DON'T KNOW THE WORD "STEEPLE".
+ PLEASE TYPE TWO SPACES.@
+LI(DISYOU)(DTHRU)
+@  A "STEEPLE" IS A STACK WHICH CONTAINS
+ TWO GREEN CUBES AND A PYRAMID.@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  I UNDERSTAND.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  ARE THERE ANY STEEPLES NOW?@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  NO.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  BUILD ONE.@
+(DISME)(FRAME WAIT)
+(MOVETO 274 1000 500) 
+(GRASP (QUOTE :B7)) 
+(MOVETO 200 320 200) 
+(UNGRASP) 
+(MOVETO 477 40 400) 
+(GRASP (QUOTE :B2)) 
+(MOVETO 200 110 100) 
+(UNGRASP) 
+(MOVETO 477 40 300) 
+(GRASP (QUOTE :B1)) 
+(MOVETO 1000 274 100) 
+(UNGRASP) 
+(MOVETO 540 140 500) 
+(GRASP (QUOTE :B5)) 
+(MOVETO 40 500 300) 
+(UNGRASP) 
+(MOVETO 500 100 200) 
+(GRASP (QUOTE :B3)) 
+(MOVETO 200 320 400) 
+(UNGRASP) 
+(MOVETO 40 500 300) 
+(GRASP (QUOTE :B5)) 
+(MOVETO 200 320 700) 
+(UNGRASP) 
+(DTHRU) 
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  CALL THE BIGGEST BLOCK "SUPERBLOCK".@
+@  OK.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  HAVE YOU PICKED SUPERBLOCK UP SINCE
+ WE BEGAN?@
+(DISME)(FRAME WAIT)(DTHRU)
+@  YES.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  WHY DID YOU DROP IT?@
+(DISME)(FRAME WAIT)(DTHRU)
+@BY "IT", I ASSUME YOU MEAN THE
+  SUPERBLOCK.
+ I CAN'T EXPLAIN A NON-EXISTENT EVENT.@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  IS THERE ANYTHING TO THE RIGHT OF
+ THE RED PYRAMID?@
+(DISME)(FRAME WAIT)(DTHRU)
+@ YES, FOUR THINGS:  THE BOX , THE RED
+ CUBE, THE BLUE PYRAMID AND THE BLOCK
+ NAMED SUPERBLOCK@
+(FRAME WAIT)(DISYOU)(DTHRU)
+@  THANK YOU.@
+(DISME)(FRAME WAIT)(DTHRU) 
+@  YOU'RE WELCOME!@
+
+
+(AND(READCH)(NOT ^A)(VALRET ':KILL/ ))
+
\ No newline at end of file