I'm creating a form in a module but when I try to add a radio group the title displays but not the options $form['todo'] = array(                                                        
'#type' =&gt; 'fieldset',
'#prefix' =&gt; '&lt;div id="todo"&gt;',
'#suffix' =&gt; '&lt;/div&gt;' . $image,    
'thot_dialog' =&gt; array(                                                     
  '#type' =&gt; 'fieldset',
  '#prefix' =&gt; '&lt;div id="thot_dialog"&gt;',
  '#suffix' =&gt; '&lt;/div&gt;'
),
'add_thot' =&gt; array(                                                      
  '#type' =&gt; 'fieldset',
  '#prefix' =&gt; '&lt;div id="add-thot"&gt;',
  '#suffix' =&gt; '&lt;/div&gt;',
  '#title' =&gt; t('Add New Thot, Related to Current Thot'),
  'new_thot_nid0' =&gt; array(                                                
      '#type' =&gt; 'hidden',
      '#default_value' =&gt; "",                                              
  ),
  'new_thot_name' =&gt; array(              
      '#type' =&gt; 'textfield',
      '#title' =&gt; 'Name Your New Thot:',
      '#default_value' =&gt; 'Type Name Here',
  ),
  'new_thot_rel' =&gt; array(
      '#type' =&gt; 'select',
      '#title' =&gt; 'Select One:',
      '#options' =&gt; $t_rels,
  ),
  'new_thot_reverse' =&gt; array(
      '#type' =&gt; 'checkbox',
      '#title' =&gt; 'Reverse the direction?',
      '#attributes' =&gt; array('#id' =&gt; 'new-thot-reverse'),
  ),
  'new_thot_options' =&gt; array(
      '#type' =&gt; 'radios',
      '#title' =&gt; 'Choose One',
      '#title_display' =&gt; TRUE,
      '#options' =&gt; array(0 =&gt; 'Create the Thot', 1 =&gt; 'Edit the Thot (Add text, etc.)'),
      '#access' =&gt; TRUE,
      '#default_value' =&gt; 0,
  ),
  'new_thot_submit' =&gt; array(
    '#type' =&gt; 'submit',
    '#value' =&gt; 'Submit Thot',
  ),
);
Your #options setting only has keys, but no values. You need something like

'#options' = array(0 =&gt; t('Closed'), 1 =&gt; t('Active'));

Example from Radios form API reference.