I have put  info here for the BTVS series 1 to 6 and include a synopsis of all the episodes. 
I hope nobody will mind if I take this info from your site. Thanks especially to Buffy Cross & Stake, Much Ado About Buffy, Slay-UK and of course UPN.


Buffy Stuff
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Series 2 Series 3 Series 4 Series 5 Series 6 Series 7

SERIES 1

Episode 1. 
Welcome To The Hellmouth:
Buffy Summers transfers to Sunnydale High to make a fresh start but can't escape her destiny as a Slayer because Sunnydale just happens to be at the mouth of Hell.

Episode 2.
The Harvest:
Buffy swings into action in a fight to the death with the Master, one of the most powerful vampires intent on making a meal of her new-found friends and re-opening the mouth of Hell.

Episode 3 
The Witch:
School spirit gets ugly when cheerleading tryouts take a supernatural turn, and
Buffy gets bewitched as she tries to make the squad. A sorta Mom from hell story.


Episode 4. 
Teacher's Pet:
Buffy gets bugged by the substitute biology teacher who's seducing and devouring the boys at Sunnydale High.

Episode 5. 
Never Kill a Boy on the First Date:
Buffy starts dating a classmate, but is interrupted by a Vampire plot to lead her
to hell.


Episode 6. 
The Pack:
Buffy and Willow discover that Xander is an animal when he and some others from school are possessed by bloodthirsty demonic hyenas.

Episode 7. 
Angel:
Buffy finds herself irresistibly drawn to the mysterious Angel, but she must pull
herself away when she uncovers his terrible secret and ungodly past.


Episode 8. 
I, Robot . . . You, Jane:
Reading can be fun - unless there's a demon trapped in the book. Willow falls
under a very literate spell that hides out on the internet and puts Buffy's life on the line.


Episode 9. 
The Puppet Show:
Someone or something is killing the school's talent show contestants for their
organs, and all eyes are on a spooky ventriloquist dummy named Sid.


Episode 10. 
Nightmares:
When everyone's nightmares become reality, Buffy has to draw on her mental
strength to bring their terrible dreams to an end.


Episode 11. 
Out Of Mind, Out Of Sight:
Ignore her at your own risk - Cordelia campaigns for the May Queen Crown, but the supernatural force of an unpopular girl conspires against her with dangerous consequences for Buffy and her friends.

Episode 12. 
Prophecy Girl:
Buffy's future looks bleak when Giles discovers an ancient book that foretells
her death and the end of the world (maybe a hint of the conclusion to Series 5), but she's determined to survive and party at the Spring Fling.

 

Here Endeth the first Series.