He also talked about his Save the Rhino Vietnam campaign and how everyone can help.

Be aware that there are some spoilers.

PAUL BLACKTHORNE: None left, whatsoever, lets face it.

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Obviously, in the past, Sara has come back a couple of times now.

Thats the toughest thing for Lance.

BLACKTHORNE: Its all miserable stuff.

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Image via The CW

The thought of being in denial of her death and that whole aspect of grief coming through was extraordinary.

The first stage is denial and going, Wake up!

I went deep with that stuff and was immersed into it.

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Image via The CW

It was pretty heavy, but it was great writing.

It was an opportunity to pick up the ball and run with it.

What was it like to have Alex Kingston back for Laurels funeral?

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Image via The CW

And its great having her around.

Alex is great to work with.

Its always nice to have a bit of fun on set with her.

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Image via The CW

How is Lance dealing with his grief?

Does he have anyone that he can lean on?

BLACKTHORNE: Thats the thing thats most devastating for Lance, with this situation.

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Image via The CW

Thats what horrifies him and scares him the most.

But then, weve got this burgeoning love with Donna Smoak.

There are some interesting scenes coming up, where you see that relationship developing.

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Laurel is no longer the woman in his life.

Maybe this woman can be, obviously in a different way, but to some degree.

It was nice to explore those scenes with Charlotte Ross.

Will all of this bring Lance closer with Felicity, especially considering who her father is?

BLACKTHORNE: Yeah, I think so.

I think Im the only decent father [on this show].

It would be interesting to explore that.

She plays around with stuff, and shes always great to work with.

BLACKTHORNE: Obviously, hes got his feelings of revenge toward Damien Darhk.

I think everybody has got a bit of a bone to pick with him, havent they?

Lance would never have any ill feelings toward Oliver for what happened to Laurel.

Its not Olivers fault that Darhk plunged one of his arrows into her heart.

Without a doubt, all of his anger is directed at Darhk.

That guy is a piece of work.

Nobody took him seriously.

It was a pretty shocking storyline.

How will it be for Lance to go to Nyssa for help in bringing his daughter back?

BLACKTHORNE: Its pretty rough for Lance.

I think Nyssa has put him on the ground twice, and shes kidnapped his ex-wife.

Shes done a few dastardly things, over the years.

Unfortunately, seemingly, to not much avail.

But its another one of those greatArrowmoments, where there are so many characters to draw from.

Suddenly, youve got Lance asking Nyssa for help.

I didnt see that one coming.

It was a weird one, for sure.

BLACKTHORNE: Everybody is just trying to learn how to deal with this loss.

Each year, the dynamics change.

This is probably going to have much to do with setting up the next seasons dynamic between the characters.

From season to season, theres always a little subtle shift in the relationships between everybody.

Its a game-changer, obviously, and its a relationship-changer, for sure.

Do you have a personal wishlist of things youd like to see happen with Lance in Season 5?

BLACKTHORNE: I enjoyed working with Team Arrow.

That was a lot of fun.

Any involvement there is great.

Id love more Team Arrow.

The shift in the relationship between Lance and Oliver is great.

Lance is always going to revere him, in that sense.

So, it would be nice to see some development, in that way.

But, who knows?

Its going to be this and its going to be that?!

Its always interesting to see what each years dynamics are going to be about.

What is your new Save the Rhino Vietnam campaign and why should everyone buy a t-shirt?

BLACKTHORNE: Ive launched another t-shirt campaign, Save the Rhino Vietnam.

Were doing all we can.

Arrowairs on Wednesday nights on The CW.