Paddy Shennan: Sue Johnston.

Byline: Paddy Shennan

IT was impossible not to feel some sympathy for the like able Sue Johnston, as she went in search of the facts about her late grandfather (Who Do You Think You Are? BBC2, Tuesday).

In particular, she wanted confirmation that the railway man drove the famous Flying Scotman: ``I thought he was a god and a god has to drive the best trains.

But, er, he didn't. Thankfully, Sue got over her disappointment and was delighted to finish her investigations with a deeper understanding of her family roots.

WOULD a new school year see the teachers turning over a new leaf?

The answer was in the opening scene, when we saw two of them urinating on the graves of their former enemies -- well, you don't change a winning formula, do you?

Back for a fourth series, Teachers (Channel 4, Tuesday) continues to provide a counterblast to those shiny ``Go on, retrain to be a teacher -- it's great fun'' adverts.

And Fat Bob's new wig is brilliant.

SECOND programme in the series, second therapy session/love-in between the featured couples (Wife Swap, Channel 4, Tuesday). But at least, before the niceness and apologies kicked in, we heard dinosaur male Phil rage at his exchange partner, Deirdre: ``Put my house back together or pack your bags and p*** off!''

If we wanted bland togetherness, we'd just watch Richard and Judy.

``DIANA certainly kept me busy, '' said Jennie Bond, in her usual ``the world revolves around me, you know'' way (Jennie Bond's Royals, five, Wednesday).

Poor her. What an inconvenience it must have been.