I accidentally deleted all my photos from my gallery can they be retrieved?

You should look up in the manual of your unspecified Samsung Universal Remote the codes for your Samsung TV.
If you don't have tha manual try here:

Free Samsung Universal Remote User Manuals ManualsOnline com

How To Program Your Samsung Universal Remote


Download Center Download Software Firmware Drivers Manuals Samsung


Samsung BN59 00599A Remote Instruction Manuals and Codes direcTutor


If still no luck do a google search for
Manual Samsung and the model of the remote
Also you can search for
Codes Samsung and model

On your phone in Settings>Accounts-Google>[your Google account], make sure you unchecked either Picasa, Google Photos, or Gallery (which are all possible sync options for the stock Gallery app). Google Photos is actually different from Google+ Photos, if you see both in that list. Google+ Photos syncs with the Photos app.
Once you've confirmed that you've unchecked the correct option, then go to the App Manager, select Gallery, and Clear Cache/Clear Data, then force stop. Now open Gallery again. The database should repopulate with your local photos, but not the cloud photos.

With my Samsung S3 and Samsung SmartTV I don't use a cable but the samsung app on the phone. Of course your TV has to be connect to your home network.

no root !
Can you retrieve deleted text messages on Android? Yeah, this video will show you the full guide for Android text message recovery. Don't hesitate and recover deleted text messages from Android 4.0, 4.1, 4.2, 4.4, 5.0, 5.1 and more versions right now!
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Some common situations that lost text messages you can recover from:
1. accidentally deleted texts on your android phone
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Watch this video and share it with your friends too so that they can also get their precious lost data back.

Yes. Remove the memory card and connect it to your computer. Then search the internet for a file retrieval software.

you can retrieve deleted photos with asoftech photo recovery program
http://www.asoftech.com/apr/

You may try this mobile phone photo recovery software which helped me before. You may check out this tutorial
Mobile Phone Data Recovery

Please be noted that your phone memory should show as a drive letter in your explorer, if not, you need to take out your memory card and connect using a card reader, or plug-in to card reader slot if there's any on your computer.

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There are now some software that is being use to retrieve deleted data from a digicam and other electronic device when you accidentally deleted the files or you reformatted the the device , check this link for some samples of data decovery software

http://www.recoverdata.mobi/recover-data/digital-camera.html
http://www.data-recovery-digital-camera.com/digital-camera/digi-pics.html

Hope that helps..............