It will be a welcome boost after a bad week in which he saw his best friend Ant McPartlin charged with a drink driving offence and withdraw from broadcasting commitments for the foreseeable future to spend time in rehab.
ITV have also been in talks regarding Ant and Dec's future on reality show I'm A Celebrity.
The decision has been made in the wake of Ant's arrest for drink-driving, after he was involved in a three-way collision in which several people sustained minor injuries.
The sketch, titled Saturday Knight Takeaway, has been described as a whodunnit and is set to run in two installments over the final two shows, after some soul-searching by TV bosses about whether to include it.
The Gogglebox star has confirmed, via Instagram, she will be joining Declan Donnelly in Florida for the final two episodes of the series. "Everyone at ITV and the Takeaway team feels we owe it to the audience to complete the series".
White House Denies Considering Pardons for Flynn and Manafort
It supposedly raises questions about whether Dowd was offering pardons to influence their actions in the investigation. Lawyers for Flynn and Manafort declined to respond to the Times' request for comment.
Cat fronted SMTV with Ant and Dec and joined the Geordie duo for the series final of Takeaway past year.
Dec took to to social media to thank his fans for the "lovely messages" following the announcement of his baby news.
The new footage shows each of the judges as a king or queen - Simon appears to be something out of Game Of Thrones with his "I'll feed you to the dogs if you don't amuse me" stare, Amanda Holden stars as Elizabeth 1st, and Alesha Dixon as Queen Victoria.
"Thanks for all the love, we really appreciate it. D x".
A source told the Daily Star, "Dec has got a big job on his hands fronting a live show from the States all on his own".
Due to the nature of the incident, Saturday Night Takeaway did not broadcast over the weekend, but will be back for the rest of the series with December.