Carol's marital status (whether she was divorced or widowed) was never directly revealed. Schwartz shopped the series to the "big three" television networks of the era. ABC, CBS, and NBC all liked the script, but each network wanted changes before they would commit to filming, so Schwartz shelved the project. Although similarities exist between the series and two 1968 theatrical release films, United Artists' Yours, Mine and Ours (starring Henry Fonda and Lucille Ball) and CBS's With Six You Get Eggroll (starring Brian Keith and Doris Day), the original script for The Brady Bunch predated the scripts for both of these films. Nonetheless, the outstanding success of Yours, Mine and Ours (the 11th-highest-grossing film of 1968) was a factor in ABC's decision to order episodes for the series. After receiving a commitment for 13 weeks of television shows from ABC in 1968, Schwartz hired film and television director John Rich to direct the pilot, then called "The Brady Brood", cast the six children from 264 interviews during that summer, and hired the actors to play the mother, father, and housekeeper roles. For the part of the father, Schwartz originally cast Bob Holiday, who was well-known for portraying Superman in a Broadway musical, but since Holiday had little on-camera experience, network executives overrode Schwartz's decision and gave the role to TV veteran Robert Reed. As the sets were built on Paramount Television stage 5, adjacent to the stage where H.R. Pufnstuf was filmed by Sid and Marty Krofft, who later produced The Brady Bunch Hour, the production crew prepared the backyard of a home in Sherman Oaks, Los Angeles, as the exterior location for the chaotic backyard wedding scene. Filming of the pilot began on Friday, October 4, 1968, and lasted eight days. Theme song and credits sequence The theme song, written by Schwartz and Frank De Vol, and originally arranged, sung, and performed by Paul Parrish, Lois Fletcher, and John Beland under the name the Peppermint Trolley Company, quickly communicated to audiences that the Bradys were a blended family. As described above, the Brady family is shown in a three-by-three grid, tic-tac-toe board-style graphic with Carol in the top center, Alice in the middle block, and Mike in the bottom center. To the right are three blocks with the boys from the oldest on top to the youngest. To the left are three blocks with the girls from the oldest