Mull - 75

Lawrence - 70 (next month)

Jordan - 63

Grier - 62

I've noticed, when I watch, that David Alan Grier's hair looks like an "old man" wig (bald on the top, and white around the sides and back), and is what especially ages his appearance. That and the salt-and-pepper (heavy on the salt) beard, moustache, and eyebrows (which the extent of the overall effect is, I'm pretty sure, courtesy of the hair & makeup department): https://image.tmdb.org/t/p/original/m0EqmQqCQ5zkofwkVwoB5chodfa.jpg

https://brieftake.com/wp-content/uploads/2018/09/dag1.jpg

For comparision, here's a picture of regular-life DAG: https://image.tmdb.org/t/p/original/2xs9NuHWIm8ML8SF5o2W6UAMoZd.jpg

Here's a cast photo of everyone as their own real-life selves: https://i.dailymail.co.uk/i/newpix/2018/05/15/01/4C3E759300000578-5729089-image-m-40_1526342856161.jpg

As for the retirement community, apparently it's a 55+ place, rather than an old folk's home. Each of the four main cast members are portraying retirees, so probably supposed to be in the 65 to lower 70s sort of age ballpark.