After 199 other episodes over 10 years, Smallville star Tom Welling says Friday's 200th episode is his favorite.

"The storyline forces Clark to reflect on the past and think about the future," he says.

8 things to know about Smallville's 200th episode

Find out which episodes his co-stars, including Allison Mack and Justin Hartley, are fond of in this video:

SMALLVILLE Stars Celebrate 200th Episode

The stars of Smallville share their favorite episode and some hints about the episode directed by Tom Welling.|Smallville|Tom Welling|Justin Hartley|Cassidy Freeman|Allison Mack|Brian Peterson|Kelly Souders|

What's your favorite episode of Smallville?