I think the majority of the episodes are good, but a few that stand out to me are:
"Martha Sings" - It was fun to watch and it was one of the first episodes I saw of this show.
"Martha and the Thief of Hearts" - I love a good mystery!
"Truman and the Deep Blue Sea" - Great storyline, in my opinion.
"Ain't Nothing But a Pound Dog" - I especially liked the ending of this one!
"Martha Treads The Boards" - Hilarious, in my opinion.