Dr Who is an oddball. Being sci fi it obviously tends toward the secular but occasionally they will throw Christianity into it in a good way.
In this episode “Gridlock” the entire population of New New York planet sing “The Old Rugged Cross” together every day.
https://www.youtube.com/watch?v=FIfHG3pHyKQ
I’m also glad that Who doesn’t get into biblical stuff.
The closest I can remember is Capaldi’s doctor saying he was as old as “your (our) messiah”.