(reading shampoo bottle)
Tweety: Rinse, rather and repeat. I think they just want us to buy more shampoo.
Granny: You see, I'm a winner.
Sam: You always were to me sweetheart. Hahahaha.
Tweety: It it me, or is recindering old romances reeee-volting.
Daws: Who said, fish and house guests stink after 3 days.
Sylvester: So this is what the back of the bookcase looks like, must be the dark humor section.
Granny: No, let's use the carryer canary.
Tweety: I've been drafted! (salutes)
Sylvester: 6 detectives in the room and not one of them can toss a sheet over the courpse.
Lojack: Where is the butler anyway baby?
Detective: He drove away during the last commercial break.
Sam: Oh, my favorite time of year. Salesmen hunting season. Hahahaha.
When Dawes(the butler) gives Master Ed McMuffin a bandaide, the bandaide has Kool Kat on them.
Sylvester's line about "landing on a witch" is a reference to "the Wizard of Oz", particularly since the vehicle he, Granny, Hector and Tweety were traveling in was caught in a tornado at the time, just like Dorothy's house in "the Wizard of Oz".
This episode pays obvious homage to the Neil Simon murder mystery parody "Murder By Death". First, all of the detectives were invited by the house's owner in a very similar manner to how the detectives were invited in "Murder By Death". Second, all the detectives except for Granny were obvious parodies of famous fictional sleuths (specifically, Sam Spade, Miss Marple, Kojak, Sherlock Holmes and Charlie Chan [three of whom were ALSO parodied in "Murder By Death"]). Third, all the detectives have had motives for the apparent murder of their host, just like in "Murder By Death". Fourth, the Kojak parody had revealed that the host was his biological father, which pays homage to Sidney Wang (who was the Charlie Chan parody in "Murder By Death") being the adopted son of the host. Fifth, it turned out that the host wasn't really dead after all, but had faked his own death by means of a realistic robot, which is another obvious "Murder By Death" homage.
(no speaker): Ye olde' ACME bed warmer
Tweety uses a "Ye olde' ACME bed warmer" to flatten Sylvester and to stop Sylvester from chasing Tweety.