30 Rock does many things very well, but the thing which 30 Rock excels at is its ability to introduce and use recurring and guest actors to their full potential. When recently writing my Best Recurring TV Characters; 30 Rock came out on top with 4/20 of the best recurring characters (2 more than any other show). To fully understand my point about how good 30 Rock is with recurring and guest characters, consider the fact that initially I intended this list to be a top 10, but ended up with more honourable mentions than those that made the list. Due to this I extended it to a Top 20 because I felt these people really deserved to be on the list, and still had too many names. There will be *spoilers* in case you are wondering.