It does seem like Mr. Haines is either the poor, put upon husband (i.e. this episode or another fun one "Little Lucy's Lethal Libation") or even when he's seemingly more under control he's still playing a criminal of some sort ("The solitary", "Dairy of a madman").

If you want a nice little show where Mr. Haines' nervous mannerisms are on display yet lead to a happy ending, try his appearance as a plumber (I don't think his character was named "Mario") on the RMT episode called "Golden Time".

Predictable (to use the term above) but cute.

Wait a minute...what's this coin on my desk? The date says "2008"? What the...?