snails

     /^\    /^\
    {  O}  {  O}
     \ /    \ /
     //     //       _------_
    //     //     ./~        ~-_
   / ~----~/     /              \
 /         :   ./       _---_    ~-
|  \________) :   ...

    _____
 ___ |[]|_n__n_I_c
|___||__|###|____}
 O-O--O-O+++--O-O

                    __            ================================
         ALCATRAZ  /__\            ||     ||<(.)>||<(.)>||     || 
       ____________|  |            ||    _||     ||     ||_    || ...

                    #####
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               ##########...

         _...,
    _..o"  )  `.
   Q      `     ;
    \_.         |
     `---,,/:.  '
          |:.    ;
 .-.      :.     ;
/:..\  ,/:.      |
;:.. v:..        '
`\:..            |
  `\:::.,/:.     ;
...

         ____
       /` .---.
      |  /  o o\
     _\  '.     |_
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        '-` _~.'
       ___/ /__
jgs  /(( '  ' ))\
    /  `======`  \

        __                                           __
       (**)                                         (**)
       IIII                                         IIII
       ####                   ...

The fourth Doctor, played by Tom Baker

                .---.
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               | ___.--'  )
             _.-'_` _%%%_/
          .-'%%% a: a %%%
              %%  L   %%_
    ...

   _|~|/|
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  /_|_|\|
  | |
  | |~|
  | | |
  | | |
  | |-|
  | | \
  | |__|
  |_|_
 /    ~-_
/        ~-_
|___________|

       _
      //\
     | \/
     ||~                                 ...