This is the theme tune to one of Gerry Anderson's under-rated TV programs, Joe 90, a  
spy-fi project about a 9 year-old lad who works as a secret agent and gets involved in many  
dangerous missions, something I dreamed of myself when I was that age! 
The theme tune is played mainly in the key of F 

This is the simple structure to the music played during the intro to each episode. 
e|---------------------| 
B|---------------------| 
G|:-------------------:| 
D|:--5---0-3-5---0-3--:| 
A|---------------------| 
E|---------------------| 
(x6) 

e|-------------|---------------|-------------------|-------------------| 
B|--8-------6--|---------------|--8---8-8-8-8-8-8--|--6---8------------| 
G|-------------|--7-------7-7--|-------------------|--------------7-7--| 
D|-------------|---------------|-------------------|-------------------| 
A|-------------|---------------|-------------------|-------------------| 
E|-------------|---------------|-------------------|-------------------| 

e|-------------------|-------------------|-----------------| 
B|--8-8-8-6----------|--8---8-8-8-8-8-8--|--6---8----------| 
G|:-----------7-7-7-:|-------------------|-----------------| 
D|:-----------------:|-------------------|-----------------| 
A|-------------------|-------------------|-----------------| 
E|-------------------|-------------------|-----------------| 

e|--8-------6--|---------------|--8---8-8-8-8-8-8--|--6---8------------| 
B|-------------|--8-------8-8--|-------------------|--------------8-8--| 
G|-------------|---------------|-------------------|-------------------| 
D|-------------|---------------|-------------------|-------------------| 
A|-------------|---------------|-------------------|-------------------| 
E|-------------|---------------|-------------------|-------------------| 

e|--8-8-8-6----------|--8---8-8-8-8-8-8--|--6---8----------| 
B|------------8-8-8--|-------------------|-----------------| 
G|:-----------------:|-------------------|-----------------| 
D|:-----------------:|-------------------|----------5-5-5--| 
A|-------------------|-------------------|-----------------| 
E|-------------------|-------------------|-----------------| 

e|----------------|---------------|--------------|----------------| 
B|----------------|---------------|--------------|----------------| 
G|----------------|----------0-1--|--2-----------|-----------4-4--| 
D|--5--------3-5--|--6-----3------|--------------|----------------| 
A|---------0------|---------------|--------------|----------------| 
E|----------------|---------------|--------------|----------------| 

e|----------------|------------------|--------------|-------------5--| 
B|----------------|------------------|--3-----------|-----------5----| 
G|--4------1-2-4--|--5--------2-4-5--|--------------|-------5-7------| 
D|----------------|------------------|--------------|----------------| 
A|----------------|------------------|--------------|----------------| 
E|----------------|------------------|--------------|----------------| 

e|-------------|---------------|-------------------|-------------------| 
B|--8-------6--|---------------|--8---8-8-8-8-8-8--|--6---8------------| 
G|-------------|--7-------7-7--|-------------------|--------------7-7--| 
D|-------------|---------------|-------------------|-------------------| 
A|-------------|---------------|-------------------|-------------------| 
E|-------------|---------------|-------------------|-------------------| 

e|-------------------|-------------------|-----------------| 
B|--8-8-8-6----------|--8---8-8-8-8-8-8--|--6---8----------| 
G|:-----------7-7-7-:|-------------------|-----------------| 
D|:-----------------:|-------------------|-----------------| 
A|-------------------|-------------------|-----------------| 
E|-------------------|-------------------|-----------------| 

e|-------------|---------------|----------------4--|--4---4-6-6-7-7-8--| 
B|--8-------6--|---------------|--8---8-----8-8----|-------------------| 
G|-------------|--7-------7-7--|-------------------|-------------------| 
D|-------------|---------------|-------------------|-------------------| 
A|-------------|---------------|-------------------|-------------------| 
E|-------------|---------------|-------------------|-------------------| 

There you go.