Lots of delicious television comedy intertextuality for long-time fans of Matt Berry tonight as he lands an unexpected role in a trashy TV soap.

After going on an acting course in LA run by Richard Chickentoss people are so convinced that Steven Toast must have actually been a doctor before he lands a pivotal medical role.

And, of course, while Toast may not have ever played a doctor, Berry played Todd Rivers on C4's cult haunted hospital comedy Darkplace - written by Matt Holness, who we don't see enough of on television these days, but he just happens to play the exquisitely named Richard Chickentoss...

And when Toast turns up for the first script meeting – only to discover he has a tiny nameplate and rubbish seat and his status is not as large as he expected – who should play the soap's smutty voiced bum-cheek waggling star Carmen? Berry's What We Do In The Shadows co-star Natasia Demetriou, who is so over the top she is back down the other side.

All of this plus Toast's repeated claim that he is about to star in the Star Wars movieeee...Toast trivia fans may know that before she landed her pivotal role in Star Wars Daisy Ridley actually had a small part in Toast of London when it was a Channel 4 series.

I know some people have said this series runs out of steam after a strong start, but for me there is no laugh let-up in his fourth episode (apart from maybe the very final payoff). Terrific comic detail means not just in-jokes and TV references but hilarious visual gags too.

Oh and have I mentioned that Larry David returns? And Aidan "Poldark" Turner pops in? All this and it has the coolest TV theme tune since The Persuaders? Oh, I just have. 

Toast of Tinseltown, Doctor Grainger, Tuesday, January 25, 10pm, BBC Two (the full series is already on iPlayer)

Pictured: Carmen (NATASIA DEMETRIOU), Steven Toast (MATT BERRY), Bellender Bojangles (BELINDA STEWART-WILSON)Image: BBC/Objective Fiction/Ben Meadows