Family Guy The Big Bang Theory (1999– ) Online
- Original Title :
- The Big Bang Theory
- Genre :
- TV Episode / Animation / Comedy
- Year :
- 1999–
- Directror :
- Dominic Polcino,Peter Shin
- Cast :
- Seth MacFarlane,Alex Borstein,Seth Green
- Writer :
- Seth MacFarlane,Seth MacFarlane
- Type :
- TV Episode
- Time :
- 30min
- Rating :
- 8.1/10
Stewie and Brian go back in time to stop Bertram from killing Leonardo da Vinci.
| Episode complete credited cast: | |||
 | Seth MacFarlane | - | Peter Griffin / Brian Griffin / Stewie Griffin / Glenn Quagmire / Tom Tucker / Leonardo da Vinci / Additional Voices (voice) |
 | Alex Borstein | - | Lois Griffin / Stephanie (voice) |
 | Seth Green | - | Chris Griffin (voice) |
 | Mila Kunis | - | Meg Griffin (voice) (credit only) |
 | Mike Henry | - | Cleveland Brown (voice) |
 | Joe Flaherty | - | Vatican Messenger (voice) |
 | Wallace Shawn | - | Bertram (voice) |
 | Danny Smith | - | (voice) |
 | Alec Sulkin | - | (voice) |
 | John Viener | - | (voice) |
The time tunnel effect is the same stock footage used for the 2005 title sequence in Доктор Кто (2005).
The episodes title is a reference to the theory and television series of the same name.
When the Vatican priest is delivering a letter to Brian from Stewie from the past, this was the same plot made at the end of Back to the Future part 2 when the western union man delivers a letter to Marty from Doc. Joe Flahery who was the Western union man in Back to the Future part 2 was the voice over actor for the Vatican priest.