JON Snow was stoned on marijuana in front of millions on Tuesday night.

Completely off his chops, in a bad way and in dire need of a hug, the poor bloke.

In fact you wonder why Channel 4 didn’t just put Krishnan in charge of the 7pm news in the first place.

No, not really. At least not the news thing.

For he truly was clobbered in the name of research for Drugs Live: Cannabis On Trial.

The second instalment of a desperate-to-be-controversial beast that had Snow clawing around to justify why he took hash and the stronger skunk for the show’s two-year clinical trial: “I didn’t feel I could anchor a programme like this without doing it.”

Odd, then, that he felt he could anchor C4’s Drugs Live: The Ecstasy Trial in 2012 without touching the stuff.

This time, though, he and co-host Christian Jessen, who was getting high himself on the aroma in the studio’s “skunk farm”, were trumpeting “a series of world firsts”, like the earth-shattering finding that dope can leave users wanting a bit of a rest.

And Snow’s announcement on revealing cannabis lights up pleasure zones in the brain: “We now know why music can sound more pleasurable when you’re stoned.”

Thank you, science.

It was worth postponing the battle against Ebola.

The pointlessness was lost on them, as was the very obvious problem in Jessen inviting viewers to tweet in with tales of memory loss from cannabis and the overwhelming pro-legalisation bias that gave only fleeting airtime to those against, what with them booking Richard Branson.

The most relevant finding, that skunk is far more dangerous to mental health than hash, came from an entirely different study.

Of much greater importance to this show was the fact it was live, C4’s favourite hobby whether it’s foxes rifling through bins or the International Space Station orbiting Earth.

Drugs Live, sadly, was duller than vet Mark Evans spending two hours staring at eggs not hatching in a box on Easter Eggs: Live.

All the talking points, like Jennie Bond on weed, were recorded weeks ago.

Yes, “TV presenter doctor” Chris Van Tulleken took what was probably hash in the studio (we never found out for sure) but it wasn’t half as astonishing as Snow’s living hell.

So when he asked Dr Val Curran: “What’s all this for?” she should have replied: “It’s for ratings and trending on social media,” which the hosts fell over themselves to announce.

For all that, live TV served up a couple of gems as ever, like a heavy metal fan in the audience saying: “A lot of my favourite music is doom and that came from Sabbath’s vibe on cannabis.”

Jessen: “I don’t know what you’re talking about.”

And the viewers’ Twitter ticker: “So the lesson we should all take from Jon Snow on skunk – NEVER have an MRI scan while stoned. Those things are SCARY.”

Almost as scary as the worrying moment he had to name as many cannabis-related words in one minute: “Frightened… hospital… psychiatric unit… knife…”

Worst Generation Game conveyor belt prize round ever.

But didn’t he do well?

Spudulikes…

The Harry Styles/older women running gags on ITV’s charming Off Their Rockers.

Lennie James in Sky1’s Critical.

Richard Madeley going rogue on Ant and Dec’s Saturday Night Takeaway’s greatest I’m A Celebrity… Get Out Of My Ear.

Narrator and Romany gypsy Alex Fechete Petru’s story on the year’s best documentary series, C4’s prejudice-whipping The Romanians Are Coming.

Let’s Play Darts For Comic Relief with Tim “The Punaway Train” Vine’s first two perfect treble 20s, the cameraman losing track of Sean Lock’s arrows which the US Air Force is now developing as stealth weapons and Tony Green on Lee Mack taking it so seriously: “No joking matter.” (Well he did do Not Going Out.) And Duncan Bannatyne admitting a John Barrowman man-crush on Big Star’s Little Star. Brings new meaning to “I’m out”.

Spuduhates…

Martin Clunes’ Arthur and George “Edinburgh” accent taking the high road, the low road and every other road between Inverness and Dumfries.

ITV claiming C4 80s music show The Tube as its own because it hasn’t got enough archive material from the vaults for Pop Gold.

Let’s Play Darts For Comic Relief showing only highlights.

C5 losing the only campmate taking 10,000BC in the right spirit, Paul Barnes, because of alleged wandering hands in the communal bed.

Joe Swash’s son Harry failing to read my mind when Big Star’s Little Star host Stephen Mulhern asked: “How would you describe your dad in three words.”

And the nightmarish mental image of EastEnders’ Big Mo shaving her legs on a promise from Fat Elvis. I’ll just leave that for you.