A new update reveals that the cast in the pilot of "How I Met Your Dad" may have been the reason CBS chose not to pick up the "HIMYM" spin-off. Despite this disappointment by many "HIMYM" fans who were excited to see "How I Met Your Dad" come to life, the CBS network assures viewers that there's still hope for the series.

According to E! News, CBS entertainment chairman Nina Tassler seemed to confirm that the network's main issue with the "How I Met Your Dad" pilot was the cast, especially the actors playing key roles; the "HIMYM" spin-off stars Greta Gerwig, Nicholas D'Agosto, Andrew Santino, Tiya Sircar, Drew Tarver, Anders Holm, and Meg Ryan providing narration for the older version of Gerwig's character.

"I think at this point you make the best decisions you can, relative to casting," Tassler explained. "There's a lot going on during pilot season and some things about this 'How I Met Your Dad' worked and some things didn't."

Tassler stressed the importance of casting by using 'The Big Bang Theory' pilot re-shoot as an example. Originally, star Kaley Cuoco wasn't in the hit sitcom's pilot.

"As I've said many, many times, 'Big Bang' would not be 'Big Bang' without having re-done that pilot," she said. "I can't imagine Kaley Cuoco not being part of that show."

Despite her hesitation with the cast, Tassler said that there's still hope for "How I Met Your Dad."

"[Producers] Craig [Bays] and Carter [Thomas] and Emily [Spivey], we adore those guys, we want very much to stay in business with them," Tassler said, adding, "We'd love the opportunity to take another shot."

As we previously reported, Deadline points out that the comedy could be picked up as an online exclusive on Netflix, and broadcast networks FOX and NBC are also eyeing the pilot.