WhoScript

WhoScript is a Doctor Who-themed esoteric programming language created by Daniel Gentry (MCS-Kaijin).
==Commands==
The language can be written in either its default form or 'one-line mode.' The following table gives each command and its one-line equivalent along with a description of what each does.
Command 	One-Line Equivalent	Description
# 	# 	Pushes the decimal value of the provided hexadecimal to the stack. If more than one value is provided, then they must be separated by spaces.
@ 	n/a 	Denotes a comment.
Pops the last two values from the stack pushes the sum. 	 	
Pops the last two values from the stack pushes the difference between the penultimate and last.	 	
* 	* 	Pops the last two values from the stack pushes the product.
/ 	/ 	Pops the last two values from the stack pushes the quotient of the penultimate divided by the last.
^ 	^ 	Pops the last two values from the stack pushes the penultimate to the power of the last.
! 	! 	Pops the last value and performs a bitwise not on it.
& 	& 	Pops the last two values from the stack performs a bitwise and on them.
 	 	Pops the last two values from the stack performs a bitwise or on them.
x 	x 	Pops the last two values from the stack performs a bitwise xor on them.
duplicate 	e 	Pushes a copy of the last value on the stack onto the stack.
truncate 	c 	Pops the last value and pushes that number rounded down. This number is still a decimal; use integer to make them integers.
integer 	i 	Pops the last value and pushes the that number as an integer. Since all operations such as addition and multiplication (but not the bitwise ones) push floating-point numbers to the stack, this is necessary to make them integers again.
switch 	w 	Switches the last two values in the stack.
pop 	> 	Pops the last value from the stack and stores it in a separate stack.
push 	< 	Pops the last value from the extra stack and pushes it to the main stack.
time_vortex 	v 	Begins an eternal loop.
paradox 	d 	Returns to beginning of time_vortex loop.
opening 	o 	Breaks a time_vortex loop.
TARDIS 	t 	Controls program flow.
psychic_paper 	p 	Controls I/O
WhoScript has two objects: TARDIS and psychic_paper. These two objects control the program flow and I/O respectively. The following tables list their functions and one-line equivalents along with a description of their effects.
TARDIS:
Command 	One-Line Equivalent	Description
_ 	n/a 	Pop the last value from the stack and go to that line of the program.
<>=	<>= 	Pop the last two values from the stack and compare the penultimate to the last based on the provided operator and push a 1 to the stack if true and a 0 otherwise.
if 	i 	Pop the last value from the stack and execute the following code up to TARDIS else or TARDIS landing if truthy.
else 	e 	Pop the last value from the stack and execute the following code up to TARDIS if or TARDIS landing if falsey.
landing 	l 	End an if/else statement.
psychic_paper:
Command	One-Line Equivalent	Description
write 	w 	Pop the last value and print it as an ASCII character to the console. If # is added to the end after a space then it prints the number popped.
read 	r 	Take input and push its ASCII value to the stack. If # is added to the end after a space then it pushes the number inputted. If no characters are provided then -1 is pushed to the stack.
clear 	c 	Clear the stack.
flush 	f 	Empty the stack and print all the values as ASCII characters to the console. If # is added to the end after a space then it prints the numbers.
==Examples==
Hello, World!
 # 48 65 6c 6c 6f 2c 20 57 6f 72 6c 64 21
 psychic_paper flush
A one-line program must begin with the number 1, must have its commands separated by semicolons, and has the ability to define strings in a much easier way. One-Line Mode is designed for better code-golfing.
 1"Hello, World!";pf
Primality Test
 # 2
 psychic_paper read #
 duplicate
 time_vortex
 	# 2
 	TARDIS =
 	TARDIS if
 		pop
 		pop
 		# 50 72 69 6d 65 21
 		psychic_paper flush
 		opening
 	TARDIS landing
 	duplicate
 	pop
 	switch
 	duplicate
 	push
 	switch
 	TARDIS =
 	TARDIS if
 		pop
 		pop
 		# 50 72 69 6d 65 21
 		psychic_paper flush
 		opening
 	TARDIS landing
 	switch
 	duplicate
 	pop
 	switch
 	duplicate
 	push
 	switch
 	/
 	duplicate
 	truncate
 	TARDIS =
 	TARDIS if
 		pop
 		pop
 		# 43 6f 6d 70 6f 73 69 74 65 21
 		psychic_paper flush
 		opening
 	TARDIS landing
 	# 1
 	+
 	integer
 	switch
 	duplicate
 	# 1
 	-
 	integer
 paradox
One-Line Mode:
 1#2;pr #;e;v;#2;t=;ti;>;>;"Prime!";pf;o;tl;e;>;w;e;<;w;t=;ti;>;>;"Prime!";pf;o;tl;w;e;>;w;e;<;w;/;e;c;t=;ti;>;>;"Composite!";pf;o;tl;#1;+;i;w;e;#1;-;i;d
An empty program produces the output "Reverse the polarity of the neutron flow!" and exits cleanly, allowing for a relatively large output with no code.
==Implementation==
MCS-Kaijin's WhoScript Python Interpreter: GitHub