Staying on the Thundertank theme, in which episodes is Panthro seen in the Thundertank as a passenger only, and who drives it on those occasions?
The only two that i can think of are:
There was also one epsiode in which Panthro was teaching Lion-O how to drive the thundertank, but can’t remember which one it was.
That’s “Trouble With Time” (though he was less teaching and more chastising), and I believe you’re right!
Wasn’t Panthro in the driver’s seat in that scene?
https://dl.dropboxusercontent.com/u/12382119/TCL/Tankscowl.png
Nope, although he does seem to take over driving from the passenger seat. The way the Tank is maneuvered at the end of the scene suggests an experienced driver.
Thanks for clearing that out, Zax. And for the cool screencap as well! 
That’s two to Wilycub, and also “Trouble With Time” identified by Thezaxfactor.
There is, however, one more episode for definite that people haven’t got, and, I’ve just remembered, arguably an implication of another.
There’s “Malcar”, right? And maybe “Mossland Monster”?
I don’t know about “Malcar”, I can’t remember. But as far as I remember, Panthro stays behind in “Mossland Monster”, it’s just Bengali driving with Lion-O beside him.
Such is my limited memory of the later series. But there is at least one additional season 1 episode where Panthro is a passenger in the Tank.
Additional hint - it’s the only time he ever rode in the rear of the vehicle.
Return of the Driller? I think Lion-O and Tygra were driving the tank when they went looking for that pink foam.
No, Panthro and Lion-O were in the front in that episode. The only time Lion-O and Tygra were seen in the front together was in “Turmagar The Tuska”, at which point Panthro was still back at the Lair fixing the Gomplin.
Was it “The Shifter”? When Panthro and Snarf’s bodies are switched?
Again, not the answer I was looking for, but technically valid I guess!
Additional hint - it’s the only time he ever rode in the rear of the vehicle.
The answer has to be “Time Switch” when the group flees Skytomb.
Can’t remember - my knowledge of season 2 is minimal. That may or may not be correct for all I know.
But in season 1 there is one instance of Panthro in the rear, and one instance of someone else offering to drive.
If no one’s going to go on with this question, may I post one?
I have no objections. 
I’ll wait for some more answers and then I’ll post it 
Actually, it’s WILYCUB who got the most correct, with “The Garden Of Delights”, “Spitting Image” and the sort-of permissible “The Shifter”
Tygra_Rules & Thezaxfactor got “Trouble With Time” between them (TR mentioned it first, then Zax filled in the episode name).
I was waiting to see if anyone could remember a specific answer that hadn’t been given. They were:
“The Transfer”, Tygra was driving, with Cheetara up front, and Lion-O and Panthro in the back (after they’d been chasing Mumm-Ra and Jackalman on foot).
To my knowledge, this is the only time we ever saw Panthro riding in the rear of the vehicle.
“Monkian’s Bargain” - this is an even more questionable answer than “The Shifter”, but I would have accepted it. At the end of the episode, Cheetara says perhaps she should drive home, and Panthro seems OK with that.
Of course, she’s been through the exact same stresses as Panthro in this episode, so there’s nothing to say she’d automatically be a safer pair of paws!
Okay I’ll make it an easy one (mainly because I can’t think up a challenging one! )
Name one character using each of the letters of the word “THUNDERCATS”.
First one to get all correct, wins. Good luck!