<Li> Gary Anthony Williams--17 episodes (Seasons 9--) </Li> <Li> Denny Siegel--14 episodes (Seasons 1--2, 6, 8) </Li> <Li> Jonathan Mangum--14 episodes (Seasons 9--) </Li> <Li> Heather Anne Campbell--9 episodes (Seasons 9--11, 13--) </Li>

Whose line is it anyway us season 1