Carvalhal's fate as Sheffield Wednesday manager could be decided after Saturday's visit of Middlesbrough.
Megson returned to his old workplace to watch Sheffield Wednesday's 2-2 draw with Hull City on Saturday.
Megson, who left West Bromwich Albion last week, was present as Sheffield Wednesday drew 2-2 with Hull City at Hillsborough.
Sam Field has been something of a revelation since returning to the West Bromwich Albion first-team.
Megson picked up Sheffield Wednesday in 12th position and took them to third before his sacking a year later.
Alan Pardew is reportedly wanted by West Bromwich Albion.
West Bromwich Albion and Newcastle United will face each other in the Premier League this evening.
West Bromwich Albion drew with Tottenham Hotspur at Wembley in the Premier League at the weekend.
West Bromwich Albion drew in the Premier League at the weekend.
Could Tony Pulis and West Bromwich Albion caretaker-manager Gary Megson replace Carlos Carvalhal at West Bromwich Albion?