All four of Barry Van Dyke's children star in this episode. Shane as Tommy Anders, Carey as Brendan Kelly, Wes as Doug & Taryn as Maddie.
The title is common British expression meaning "Don't ever give up, do not despair" which dates back to the early 19th century and is used to describe the British personality to never give up even in the face of insurmountable odds and difficulties.
Around 25 years after this episode, Shane Van Dyke and Carey Van Dyke wrote the screenplay for Don't Worry Darling.
This makes the 3rd episode that Josh Roman, Carey van Dyke, Shane van Dyke star together playing different characters. First was season 4 ep 21; second was s5 ep 12 and they did a fourth, s8 ep 22, the series final.