shows that were on more than one network:
Unsolved Mysteries(NBC and Lifetime)
Buffy(WB and UPN)
Roswell(WB and UPN)
The Hughleys(ABC and UPN)
Star Trek series(NBC, syndication, and UPN)

Leave it to Beaver(cbs, abc)

Diff'rent Strokes (NBC,ABC)
Get Smart (NBC,CBS)
Hazel (NBC,CBS)

Family Matters (ABC, CBS)
Step by Step (ABC, CBS)
Taxi (ABC, NBC)

Sabrina the Teenage Witch (ABC/WB)
Wonderfull World of Disney (NBC/CBS/ABC)
Jag (NBC?/CBS)

The Hogan Family (NBC, CBS)

Saved By The Bell (The Disney Channel/NBC)

For Your Love (NBC/WB)

Lizzie McGuire (The Disney Channel/ABC)

Step By Step (ABC/CBS)

Jeff Foxworthy Show(ABC,NBC)
The Naked Truth(ABC,NBC)
Wolf Lake(CBS,UPN)

"My Three Sons" (ABC/CBS)
"The Danny Thomas Show" (ABC/CBS)
"Unsolved Mysteries" (NBC/CBS/Lifetime)
"Silver Spoons" (NBC/Syndicated)
"We Got it Made" (NBC/Syndicated)
"Punky Brewster" (NBC/Syndicated)
"Bachelor Father" (NBC/CBS/ABC)
"Father Knows Best" (NBC/CBS)

Charles In Charge (CBS/Syndication)

Mama's Family (CBS/Syndication)

Rosarito Weekend --highly unknown boring show. :o (KDOCTV/ and sometimes The WB)

Something So Right (NBC/ABC)
The Days and Nights of Molly Dodd (NBC/Lifetime)