It seems unusual that Frasier was holding Eddie while he was sitting in the front seat because when it comes to Eddie Frasier does not care to hold or pet him and he usually tells Eddie to get down or shoos him off.
They are afraid to re-enter the US from Canada without passports, but how were they able to get OUT of the US in the first place?
When Frasier first asked Niles to join Frasier and Martin on their trip, Niles refused telling Frasier that as his brother, Frasier is entitled to bone marrow and one kidney, but not a Winnebago trip. However, in "Someone to Watch Over Me," Frasier's bodyguard tells him she needs a list of family members who are willing to donate organs should anything happen to Frasier at the awards ceremony. Niles then tells Frasier he has abnormally small kidneys, indicating he would not be willing to give one to Frasier.
Martin: Now listen. In the off chance a guard asks you a question, can you say anything in an American accent?
Daphne: (in a poor imitation of an American accent) Sure.
Martin: Ok what?
Daphne: You just heard it.
Daphne: (again in a poor imitation of an American accent)
(back to a British accent)
Daphne: Thats it! Thats all I can say! Oh, I need a cup of tea.
Frasier: Tea! Why don't you just wave a crumpet in the air and start singing "God Saves the Queen!".
Frasier: You've got to come with us!
Niles: Frasier, you're my brother. That entitles you to my bone marrow and one of my kidneys, but *this* is an imposition!
Border Patrol Officer: And where were you born, sir?
Frasier: Seattle, Washington. Oh, you want to what country. (laughs) America. Of course. I'm quite an American really, I bowl all the time, and, uh, always with the law and order guy, you know that's...
Border Patrol Officer: That's fine, sir. I don't need any more detail.
Frasier: Dad I can't believe that you of all people, a former policeman are actually suggesting that we commit a felony.
Martin: Oh I crossed this border plenty. 99 times out of a 100 the guards just peek in the door and wave you through, it's no big deal. Come on, let's get out of here.
Niles: Mmm, what if they pull us over?
Martin: Well, then Daphne's just going to have to convince them she's an American.
Daphne: Bloody right. It beats having me bum bounced back across the pond. Let's give it a bash.
Frasier: Oh yes, this is foolproof.
Martin: We'll just sneak her back across the border.
Niles: That's called smuggling.
Martin: (very sarcastic) Oh, thanks Niles, I knew it was something bad guys did, I just didn't know the technical term.
Martin: Hey watch it! I got my kids in the car! (Martin yells at a car who cuts them off in the Winnebago)
Martin: Alright now don't worry about anything, there's gotta be an access road leading back onto that turnoff, where is it, (fumbling with a crumpled up map) where is it, oh it's always in the crack!
Frasier: So is life, Dad.
Episode Title: Travels With Martin
The title of this episode is inspired by the John Steinbeck book Travels with Charlie (where Charlie is none other than the author's dog). In that book, Steinbeck rents a van and travels through the USA.