Starring:
Angel as Dad!
Buffy as Mom!
 

Also Starring:

Darla as Angel's Kinky Mother
The Master as Angel's Powermad Father
Joyce Summers as Buffy's Unobservant Mother
Hank Summers as Buffy's Confused Father
Drusilla as Angel's Crazy Daughter by another woman
Spike as Angel's Wacky Son by another woman
Willow Rosenberg as Buffy's Genius Daughter by another man
Xander Harris as Buffy's Zany Son by another man
 

With:

Rupert Giles as Buffy's English Boss
Cordelia Chase as Buffy and Angel's Nosy Nieghbour
Oz as Willow's Lycanthrope Boyfriend
Principal Snyder as Buffy and Angel's Annoying Landlord