I briefly mentioned this show when along with Seaquest when OM1 talked about Surface as examples of NBC dropping the ball with scifi series. The network showed several of the episodes out of order and episodes got bumped from the schedule for Sunday night football. It's not a terrible show but it's not an alltime favorite for me. The storylines are occassionally very cheesy with all the nods to the Gaia Hypothesis and it ends on a terrible cliffhanger too. The last aired episode is NOT the series finale. I think 1x20 is the actual last episode by production order.
edit- Looked up the correct episode order
1- First Contact 1 (1) (Order aired)
2- First Contact 2 (2)
3- The Man Who Fell to Earth (3)
4- Life Lessons (4)
5- Promises, Promises (5)
6- A Memory Play (6)
7- Natural Born Grendlers (21) (Why?)
8- Water (7)
9- The Church of Morgan (8)
10- The Enemy Within (9)
11- Redemption (10)
12- Moon Cross (11)
13- Better Living through Morganite 1 (12)
14- Better Living through Morganite 2 (13)
15- Grendlers in the Myst (14)
16- The Greatest Love Story Never Told (15)
17- Brave New Pacifica (16)
18- The Boy who would be Terrian king (18)
19- After the Thaw (17)
20- Survival of the Fittest (19)
21- Flower Child (22)
22- All About Eve (20)
Natural Born Grendlers which is episode 7 was shown next to LAST? All About Eve is the series finale had two episodes shown AFTER it and they switched episodes 18 and 19's order.