7th Heaven - Season 5 - Eps 12: One Hundred
As Annie plans a mysterious day of cleaning as Eric discovers the shocking news that Mary ran away from ""The Colonel""'s to come back home because of a devious scheme she had with Robbie and freaks out. Eric is convinced that more trouble is brewing and goes to insane lengths to find answers. In reality, Mary is heading home for a huge surprise birthday party for Eric, attended by all the people whose lives he's changed for the better in the past few years. Chores at home are interrupted, however, when Ruthie discovers Frankie and Johnny's baby, Mercy at the Camden front doorstep. Meanwhile, Lucy stays with her friend Mike's (guest-star Jeremy Lelliot) near catatonic mother for the day, and drops a proverbial bomb on Lucy. Also, Matt and Simon try to figure out why they delivered Mrs. Bink (guest-star Eileen Brennan) to the hospital.
About 7th Heaven

Title: 7th Heaven
First Air Date: 1996-08-26
Last Air Date: 2007-05-13
Status: Ended
Rating: 6.4/10 (from 205 votes)
Language: EN
Seasons: 11
Total Episodes: 243
Network: The WB The CW
Genres: Family, Drama, Comedy
Production Companies: Spelling Television, CBS Studios
Synopsis
Reverend Eric Camden and his wife Annie have always had their hands full caring for seven children, not to mention the friends, sweethearts and spouses that continually come and go in the Camden household.
Cast

Stephen Collins
Eric Camden

Catherine Hicks
Annie Camden

Beverley Mitchell
Lucy Camden

George Stults
Kevin Kinkirk

Nikolas Brino
Sam Camden

Lorenzo Brino
David Camden