You can read the whole series here.
Gethsemane 4. Luke + Mark – Matthew in between. John: off the ledger.
Luke doesn’t have anything on the conversation at Kidron, but he puts it in the supper. Luke has a more upbeat narrative, he doesn’t like to speak badly of the legends of the church (his Gospel is partly shaped by Acts). So he tempers a lot of it. The prophecy about Peter is still there, but in Acts he tells how Peter is fearless in preaching, he’s a heroic figure. This is always true of venerated religious people of the past. We always ignore or minimize their faults and failures. We did the same thing in writing about Joseph Smith in the 1850s. He was practically sinless by some lights. Of course he was nothing like that, but it’s natural and that’s Luke. Remember, he’s writing 50-60 years after the fact. Luke can’t help Judas, there’s nothing really that can be done to mitigate that story. But for the other disciples and Peter in particular, he puts in positive statements about their ultimate fate: