Doubt - Using the possessive

Hi. I was hoping you could help me with this one.

Supposing I would make a CD with soundtracks from several TV Series. Within the following options which one is the best?:

a) Series Hits

b) Series' Hits

c) Hits from Series

d) Hits of series

e) other?

I always get a bit confused about this, because sometimes we use the " 's", sometime we don't, sometimes we use "of" and everything gets confusing...

Thank you. =)