The Following Review is as messy as said Audio that it reviews it, so keep it in mind!

Is it messy? Yes.
Is it flawed? Yes.
Is it one of my favorite Doctor Who Stories ever? Also Yes.

Zagreus is one of those Stories, where you either see somebody love it or loathe it (or the secret third thing, where they are just baffled by it). I fall under the Camp of love it.
Zagreus is in many ways the biggest fanservice ANY media of the Show has done in my mind (I am sure there are bigger examples, but this one always gets on my mind first) and yet it’s quite bold. While I understand the disappointment of not having a Multi Doctor Story for the 40th or at least not a more “regular” one, I absolutely adore the approach of giving our leads different Roles. Everybody here gives a great Performance and I love how much we travel through Time and Places, because what is more Who then travelling through Space and Time in the weirdest Way possible?
It not being what you expect is perfect especially fitting knowing that this is Big Finish first and only Time of making an Anniversary Special with an incumbent (yes Shalka, love you, my sweet darling but for all I know you are in a weird limbo of Unbound).

Having Wonderland Imagery is lovely and fits well, while this Imagery can get a bit tiring over time, this Story released in a Time when it wasn’t overused (and in general you can rarely get me not liking it in any way). Courtney being a jealous Personification of a Tardis is amazing!
Charley getting through all those time and places, seeing India interact with the 80s Doctor Actors was such a blast! And of course, Louise and Lalla are such a good pairing!
Also is it a hot take to say it but I think this was easily my favorite Use of Rassilon in Who?

Oh and of course McGann is a blast again and I love his Perfomance(s) here, dare I say his best one as of yet even?

Really if I am being honest the only real complain I got for this is how distorted they made Jon’s Voice here, seriously who made this Decision?
Besides that it’s a flawed perfect Masterpiece for me. The very best, the very worst and the very weird of Big Finish summarize in one Audio.