Stevie May scores 51 seconds after coming on at half-time to break deadlock; Cammy MacPherson's deflected second puts hosts in firm control
Callum Hendry then Shaun Rooney both dink ball over keeper in closing minutes to seal Premiership safety
Inverness scored two late goals in first leg to salvage draw
Stevie May
Talk about a super sub!
James Brown's cross from the left is glanced by Melker Hallberg, who has the freedom of Perth, but Mark Ridgers claws the ball off the line.
But who's there? Stevie May! The striker has only been on the pitch for a minute and bags a HUGE goal from close range.
Image source, BBC SportSt Johnstone 0-0 Inverness CT (2-2)
We're back under way in Perth.
Half-time change for the top-flight side as Stevie May is thrown on for Glenn Middleton, who had a really quiet first half.
HT: St Johnstone 0-0 Inverness CT (2-2)
Rory Loy
Former Dundee & St Mirren forward on BBC Sportsound
Quote MessageInverness have taken more chances and had more joy. St Johnstone could be a lot braver on the ball when they've got it.
HT: St Johnstone 0-0 Inverness CT (2-2)
Rory Loy
Former Dundee & St Mirren forward on BBC Sportsound
Quote MessageIf you asked some of the St Johnstone players who played in the cup finals: 'What is more nerve-wracking?' - no-one wants a relegation on their CV and coming down to the final 45 minutes, it will be nervy.
HT: St Johnstone 0-0 Inverness CT (2-2)
Stuart Kettlewell
Former Ross County manager on BBC Sportsound
Quote MessageWe have been lacking quality. St Johnstone, as the Premiership side, haven't had a lot of invention or carried a lot of threat in front of goal and we would expect more from them.
HT: St Johnstone 0-0 Inverness CT (2-2)
Rory Loy
Former Dundee & St Mirren forward on BBC Sportsound
Quote MessageI don't think either manager will be happy. At a push, Billy Dodds? His issue is Inverness aren't creating enough. Neither will be too pleased.
The Championship side will be the happier of the two teams.
Billy Dodds' men have been bright and looked far more settled than the Premiership hosts.
St Johnstone really need to improve, their top-flight status is on the line here.
Image source, SNSSt Johnstone 0-0 Inverness CT (2-2)
Dan Cleary wins a free-kick after a positive run from the centre-back.
Melker Hallberg hoists it in again. The ball eventually drops to Murray Davidson who attempts to tee up Callum Hendry with a neat touch.
The striker can't get the ball out his feet, though.
St Johnstone 0-0 Inverness CT (2-2)
An overhit pass to James Brown on the left runs behind for an Inverness goal kick.
Story of St Johnstone's first half. No composure.
St Johnstone 0-0 Inverness CT (2-2)
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St Johnstone 0-0 Inverness CT (2-2)
Callum Davidson ain't happy with his team.
St Johnstone 0-0 Inverness CT (2-2)
Better pressure from the home side as Inverness deal with a Glenn Middleton cross before Dan Cleary does well to win a corner.
In comes the delivery but it's dealt with again.
St Johnstone 0-0 Inverness CT (2-2)
Austin Samuels does really well to fashion a crossing opportunity but Billy Mckay's touch is a little heavy in the box.
Was a difficult ball to control.
St Johnstone 0-0 Inverness CT (2-2)
Rory Loy
Former Dundee & St Mirren forward on BBC Sportsound
Quote MessageSt Johnstone's defensive record isn't actually a million miles away from what it was last season, it's scoring goals that has been the issue.
St Johnstone 0-0 Inverness CT (2-2)
Cracking defence-splitting pass from David Carson finds Austin Samuels again.
The forward is thwarted by a crucial sliding challenge, though.
Tame shouts for a penalty for handball from the resulting corner. Nothing doing, however.
St Johnstone 0-0 Inverness CT (2-2)
Half an hour in and this one feels like a proper 50/50 game.
Not what you want to be hearing if you're Saints fan...
St Johnstone 0-0 Inverness CT (2-2)
That man Austin Samuels is causing havoc again.
Billy Mckay slips the Aberdeen loanee in on the right of the box. He slides to make contact with the ball, forcing Zander Clark into a smart stop.
St Johnstone 0-0 Inverness CT (2-2)
St Johnstone have a corner up the other end but Dan Cleary's attempted header at the front post is all wrong.
St Johnstone 0-0 Inverness CT (2-2)
James Brown does really well to stop Austin Samuels racing through on goal.
The speedy forward's pace is concerning the St Johnstone backline.
St Johnstone 0-0 Inverness CT (2-2)
Stuart Kettlewell
Former Ross County manager on BBC Sportsound
Quote MessageIt is a good opportunity. Wallace Duffy follows the flight of the ball well. Liam Gordon and Murray Davidson, two guys you'd expect to get the first connection on it, get their timing wrong.