OK, here's what I have so far:

Martha Brewster - DR Ginny

Teddy Brewster

The Rev. Dr. Harper - My DH Richard (he already has the wardrobe!)

Elaine Harper

Officer Klein

Mr. Gibbs

Abby Brewster - DR Vixmom

Mortimer Brewster - DR Ron Pulliam

Jonathan Brewster - DR TCB

Mr. Witherspoon - DR JRand or DR Elmore

Officer Brophy - DR George

Officer O'Hara - DR MattH

Dr. Einstein

Lieutenant Rooney

Did I miss anyone? Who wants to cast the other roles?